How to fix hesitation under acceleration or heavy throttle in your car

www.buymeacoffee.com/urbanhomesQ
In this episode, we demonstrate to you how to fix a car's intermittent misfires or hesitation under heavy throttle or acceleration

[@didarden]

Lost your train of thought.... Lol so nice to know someone else besides me does this. Thank you my friend

[@ProfessorDIY]

Any time my friend

[@dupont4sure]

you can put me on that list as well..lol

[@omarfarooq5828]

Thank you for sharing your troubleshooting process. I am facing the exact same issue and will go for changing soark plugs as well.

[@ProfessorDIY]

Plugs are always a good starting place unless they are brand new

[@gregsantos9731]

Yes. I like watching automotive articles like this one. Actually I have subscribed to your channel. I'm Greg Santos, watching here in Manila, Philippines 🇵🇭

[@ProfessorDIY]

Thank you Greg and welcome to our community!

[@akshaygaming1869]

Received your video as a recommendation in my youtube, Been a diy guy myself who services his own bikes, this ism y first time doing a car service at home. Been learning everything even engine overhaul from last 5 years have gained the therotical and some practical knowledge at friends workshop. But I've a question for you sir, how do I clean my car radiator and condenser fins ? There's the britecoil, tertaclean alkaline solution that doesn the job perfectly but many claims it burns the aluminium lines. Also I'm gona clean the intake manifold and fuel injectors Can I reuse the same gaskit ? My cars maruti Suzuki astar 2010 model type 1.

[@tm5346]

Love video thank you !

[@ProfessorDIY]

Any time

[@ultimatedijo7058]

Thanks. Same issue. Sorted

[@ProfessorDIY]

Awresome!

[@wildhorses267]

This is exactly what my kia is doing. Thank you so much for information!!!

[@ProfessorDIY]

Very glad to be able to help.

[@MisterWoes]

good job.

[@ProfessorDIY]

Thank you

[@thedonutmiata5135]

Another good thing to look at is if there is oil in the spark plugs or coils. If there is, replace the valve cover gasket. That’s what I’m doing to hopefully fix my issue. If that doesn’t fully fix it I’ll check the sensors too. I already replaced the spark plugs.

[@ProfessorDIY]

In older cars some oil in the plugs is not a concern but if they are soaked you are correct

[@reginaldbrown9676]

To

[@paulsultana8683]

@@ProfessorDIY what causes oil soaked spark plug ? Out of 6 one had a lot of oil on and in it - every plug was black

[@ProfessorDIY]

@@paulsultana8683 if you are lucky a failing PCV valve or running very rich, common causes are Damaged spark plug tubes, worn piston rings or damaged valve seals what other symptoms do you have?

[@sharper9164]

First of all thank you for answering to every comment! I got some issues with Nissan Primera P11. Its SR20De engine. When the engine is cold and I accelerate a little on idle, the RPM stays for a few seconds by itself. Changed sparks, cables, distributor cap, cleaned MAF and even changed the knock sensor. It is very odd, the RPM just stays on for a few seconds then it drops

[@ProfessorDIY]

You may want to clean the Idler control valve and if that does not help replace it.

[@adamb84]

Newer electronic drive by wire throttle body's have a TP sensor to control that, they don't have idle air control valves. I'm going through same issue, I tried cleaning the throttle body but it still needs replacing. Mines is messed up as if someone purposely sabotage me. Mines opens and closes weird and kept moving one turn after letting off the gas pedal. I know my throttle is bad and cleaning doesn't help. My car as I accelerat the TP sensor won't go over 25% percent. Before it was able to go up to 30% and now it 25% and has been getting lower. I need to change my throttle body asap...

[@ProfessorDIY]

@@adamb84 it has nothing to do with modern but rather the engineering, throttle positioning does not substitute a ICV they perform different functions, the idle is either controlled by the ECU or a vacuum valve. Maybe you need to change the positioning sensor both at your pedal and at your throttle body if you have a multimeter you can test them to ensure they are still goog. throttle bodies rarely go bad

[@sharper9164]

Will soon try it out. Thanks a lot! Updating the situation when I check that out.

[@julesfalcone]

Subscribed.

[@ProfessorDIY]

Welcome friend!

[@michaelsteyn5325]

Oh oh oh... I was going to use brake disc cleaner on the maf sensor... thank you for pointing out the right stuff to use. I have a C220 cdi, 16 years old with 109k miles. I've had it 5 years and acceleration from start is very slow untill the turbo comes in. There are no fault codes for the maf but I'm sure a good clean / maintainance could maybe fix the acceleration issue. It is too lazy for a 2.2 engine, there must be something wrong. If this is still the original maf sensor, I'm thinking it might still work but after all these years never cleaned, maybe, maybe it is not reading correct values.

[@sebasjon33]

Looks like you reply to every comment on here so I'll give it a shot. I have a 2013 BMW 528i xdrive that hesitates when accelerating. The problem did very minorly begin after changing out the spark plugs and coil packs. 3 months after changing those (spark plugs and coil packs) I installed an exhaust cutout that bypassed the resonator and muffler. This when I really started to notice the issue, although it might have just been a coincidence. Since then, I have switched the coil packs back to the original ones with no improvement and I have gone through 2 tanks of fuel injector cleaner with no improvement. I noticed my vacuum line had some oil in it from the vacuum pump sucking up engine oil so I am replacing the vacuum pump next. I think the vacuum line operates the wastegate and maybe that is affecting my car? If the vacuum pump doesn't work, I will do the spark plugs again. Maybe I bought bad spark plugs. Permanent engine code cylinder 1 misfire P0301 and stored code engine too lean P0171

[@ProfessorDIY]

switch the cylinder one coil with the coil from cylinder 3 and see if you get a p0303 error, do not worry about the lean code, for now, it is more likely to have a bad coil than a bad spark plug unless you bought the wrong temperature range plugs, what grade of gasoline are you using? you can also try to add some octane booster and see if it makes a difference, I have an M5 and love it!

[@nevinkuser9892]

Too lean means not enough fuel pressure. Try changing your fuel filter first and if that doesn't work check the fuel regulator. And lastly check the fuel pump. My 2015 just had a fuel pump slowly fail so a 2013 is right on schedule to need a replacement fuel pump.

[@ioandriment3140]

My throttle body is stacked open. Mass airflow (MAF) sensor/volume air flow (VAF) sensor - range/performance problem Mass Air Flow Circuit Range/Performance Problem, Intake air flap control actuator position sensor - circuit high, Intake air temperature (IAT) sensor - high input, Mass airflow (MAF) sensor/volume air flow (VAF) sensor - range/performance problem. Can you think those faults can cause a fault to my throttle body to be stuck open? Thank you very much for this video. It's always something to learn. Much appreciated. I will follow any advice. First I will start with this one.

[@ProfessorDIY]

no O suspect that a cleaning will free the throttle body

[@jasonpridgen1879]

Hey Sir I have a 95 Nissan hardbody truck 4 cylinder 2 wheel drive. 5 speed. I have problems when taking off in the low gears of trk jerking and some rough idle. We have replaced throttle body position sensor still same situation. We cleaned throttle body. If it is not the mass air flow then what else do I need to check. Thanks

[@ProfessorDIY]

Does it have any codes? It can also be bad spark plugs or even a dirty fuel filter. Run a good fuel system cleaner a couple of times and see if it improves, worsens or even makes no difference.

[@FirstNameLastName-pc8ht]

Hey same issue here but I work as an hood technician with a 2002 Nissan gxe 1.8l and I did fuel system cleaning, replacing camshaft, and still no fix

thnx for this info. i am new to ur channel. keep up the good wrk. we need more ppl like u. do you know the reason for a good running old 2009 vehicle with 195thou miles that now just sudden has developes a weird feeling in the STEERING WHELL when driving. It not from the front ends. i am sure. It feels more a grinding feeling in the steering, not a vibration, but a not so smooth feeling anymore as when it was new. It is weird, and hard to really explain. This vehicle runs great still. You feel it in the steering wheel when the engine is running, this sensation is not felt on the body of the vehicle at all. thnx.again.

[@ProfessorDIY]

I would check the steering pump, steering is not to be messed with however

ok, thnx.@@ProfessorDIY

[@ProfessorDIY]

Any time

[@muzamelazizi9738]

Hello, i have this issue aswell and wanted to know what would happen if you push the gas pedal down when it was not in gear. As i have the same symptons but i was thinking if it was any problems with sparks or maf sensor then how can it happen when in neutral. Thanks

[@ProfessorDIY]

More than likely is is a throttle position sensor

[@muzamelazizi9738]

@@ProfessorDIY Thanks, I will check this out

[@horacesawyer2487]

I like this. : ) Facing similar issue. Pulling my hair out. I'm not a pro mech. What other clues lead to you the particular spark plug?

[@ProfessorDIY]

You need an OBD II to identify the cylinder or if it is constant unplug the ignition cables one by one the one that when unplugged does not change the sound of the engine is the bad one.

[@horacesawyer2487]

@@ProfessorDIY : Perfect! You are skilled. : ) Thank you and God Bless you! I like your production on the video too. : )

[@ProfessorDIY]

@@horacesawyer2487 Thank you for your comment and for watching!

[@bestsleep3151]

I like your video.

[@ProfessorDIY]

Thanks for liking

[@cristianmadrigal7003]

Ok, hopefully, u answer because im really trying not to give up on my car, it idles pretty good and starts right up but my problem is whem i try to accelerate it struggles to move/run ... I've changed fuel pump, maf ,pedal sensor cleaned throttle idk what else to do

[@ProfessorDIY]

Check the throttle position sensor and the acceleration pedal position sensor

[@Derekerds]

I’m having a similar issue with my 2011 GTI although I’m only getting hesitation briefly at higher RMPS in gears 4-6 the car has an APR stage 1 tune high flow cat and down pipe along with a cold air intake it has a few codes that I haven’t been able to troubleshoot those being MAP/MAF Throttle Position (P0068) Mass or Volume Air Flow Sensor "A" Circuit Range/ Performance (P0101) and Fuel Rail/System Pressure - Too High (P0088) I’ve cleaned the MAF and felt the hesitation again recently I’m pretty stumped advice would be awesome

[@ProfessorDIY]

I would replace your throttle position sensor first.

[@mesniburek.]

It is my birthday today, thank you 😁🎉

[@ProfessorDIY]

once again then: Happy birthday

[@jeangrey3045]

My 2015 Silverado5.3 hesitates when accelerating, when you push the pedal all at once it takes a sec to respond and then the truck accelerates but feels like a kick when it does, I replaced tps sensor and map censor, the only one I haven’t replaced is maf but when I checked it it looked brand new so I decided not to change but do you think it could me the maf ?? , my truck also shakes a little at idle tbh could be torque converter since 2014 and 15 have this problem but idk maybe it’s sum else

[@ProfessorDIY]

i think your vehicle is misfiring

[@uncleasshole3787]

03 avalanche same issue. Changed all o2 sensors, map, maf, tps as well as throttle body, knock, intake temp sensor , 5 different fuel sources including purple, premium, mid n low grade even poured shine in there.

[@ProfessorDIY]

@@uncleasshole3787 next step ignition coils.

[@jeangrey3045]

@@uncleasshole3787 tbh I heard maybe a tune up will fix it but idk where to get a tune up at and what a tune up really is.

[@heinanchy8873]

Hi sir, theres problem on ford explorer v6 gas engine that im still fixing right now, when youre on half gas pedal engine is hesitating and vibrating then when you put off gas pedal engine minor was good, What was the problem on that engine?

[@ProfessorDIY]

Check all the things we discussed plus the throttle position sensor

[@keiravanhanken4876]

I guess I’m going to add a comment in hopes to get a reply. I’m a single full time mom & just bought a 2013 Hyundai Santa Fe sport mode from a reputable dealership. A few hours ago I turned on to the on-ramp to merge on to the interstate. When I hit the gas it didn’t accelerate at all like it normally does or should. Instead the rpm’s shot up way higher than they normally do & the car was hardly accelerating. I’m talking like 3 mph per 15 seconds. I was pretty low on gas so I decided to get off the highway & see if that helped the issue. It seemed fine, until I pulled out of the parking lot. Then the problem continued again. I live in the mountains & I had to go up a maybe 1/4 mile long steep mountain. I could hardly go past 40-50 mph. I stopped & opened the hood & let the car cool down because right before this all started I had been parked in a hot parking lot for several hours & it was 90 Fahrenheit outside. Since this has started, I’ve noticed I cannot accelerate up hills past 40, maybe 50 tops if I am lucky. It seems to be somewhat fine until I have to go over 30-40. It seems like the rpm’s are normal ish until I get to that speed as well. I literally don’t know what to do. I just want to cry honestly. I just bought this car 3 weeks ago. Spent 15k on it from the ford dealership. From everything I’ve read about this problem online from others personal stories, it seems like this is a common problem for Hyundais with no fix.

[@ProfessorDIY]

It is possible that it is an air filter issue or even a vacuum leak, do you hear anything like a section sound when you have the hood open?

[@keiravanhanken4876]

@@ProfessorDIY I’m assuming I would hear that sound with the car on, correct? When I opened the hood I had the car off. So I can check it with the car on & see!

[@keiravanhanken4876]

@@ProfessorDIY I just opened the hood, with the car on. I did not hear a suction sound that was noticeable to my amateur ears. What I did notice was extreme heat that I feel like I shouldn’t be there. Especially after the car was just off for 15 minutes. It almost seemed like the hot air was blowing from somewhere but I couldn’t quite figure out from where.

[@keiravanhanken4876]

@@ProfessorDIY also, when I have the acceleration problem (going up hills) (getting up past 40), the car sounds like a lawn mower. Kinda like a deep mmmmmmm sound

[@ProfessorDIY]

@@keiravanhanken4876 other than the lack of acceleration any other symptoms? check engine light on?

[@Unknownscientists]

Hi sir, I have a tuned Range Rover Svr, 65k miles has given me no issues at all except for o2 sensors because I put down pipes on the exhaust. After I did the tune for the down pipes, the car has a weird “ jerk” or “ stutter” right before red line and the after the shift, or when I accelerate without using the paddle shifters it stutters badly. The car in 65k miles has had no maintenance except for spark plugs changes which I did 2 days ago. What do you think the culprit is? Faulty MAF or/and maybe o2?

[@ProfessorDIY]

My best guess is the O2 sensors, also dod you reprogram the ECU after the mod?

[@Unknownscientists]

@@ProfessorDIY I have replaced the o2 a few times I already since the incident has occurred. I do off road the car heavily as well so the engine bay is extremely dirty and maybe that maf somehow in the middle of it all got dirty as well. Yes the ECU was reprogrammed when the car got tuned. The only thing I encountered after the tune was the o2 sensor check engine light, I replaced those sensors and never got a light again, but the stutter remained. It’s not a huge bad stutter but nonetheless it is there.

[@Unknownscientists]

@@ProfessorDIY also , the car shoots flames but primarily from only one side , leading me to believe it may be running lean on the side it doesn’t shoot flames .

[@ProfessorDIY]

@@Unknownscientists It all points to ECU

[@Unknownscientists]

@@ProfessorDIY wanted to quickly update, brought it in to a friends shop. On the obd2 data reader the bank 2 sensor 1 is not responding at all. We’re going to be replacing that now.

[@tariqalkindi8045]

Thanks professor i need your advice i have ford spart trac limited 2007 it drives at good speed then suddenly drops say from 120mph to 50 mph what could be the reason? gear sound fine>

[@ProfessorDIY]

What else is happening? Rapid drop in RPM or rise in RPM?

[@tariqalkindi8045]

Rapid drop in RPM

[@abdulbeany1894]

Hi can a gearbox mount cause car to shake and make rattling noise at idle manual car thanks

[@ProfessorDIY]

Yesbt soo can a lot of other things

[@gabrielramirez-bb9xe]

YESS THAT EXACTLY WHAT ITS DOING.

[@ProfessorDIY]

Let me know how you fixed it!

[@bjjones18]

What kind of sensor was the second sensor you pulled out?

[@ProfessorDIY]

In this car that is a temperature sensor

[@tabs8140]

I have got a vauxhall corsa loses power when accelerating replaced throttle body and electronic accelerator pedal still no change please what could be the problem

[@ProfessorDIY]

unless you own the electric one The throttle position sensor or accelerator pedal position sensor alternatively air system leaks or dirty air filter/MAF

[@johnmakola7068]

It also drained the battery but alternator is working vw polo bujwa 1.6

[@HeyMikeyLikesIt2]

Only use Mass Air Flow cleaner…. Amen.

[@butterbean0364]

Hey gym hood man! Could you help me with my 2004 trailblazer with the I6 engine. I replaced the vvt solinoid because it’s popping a p0014 engine code after I replaced the part that should have fixed my problem. But it’s still here. W

[@ProfessorDIY]

Other issues can cause error P0014

[@butterbean0364]

@@ProfessorDIY what would you suggest my good man?

[@ProfessorDIY]

@@butterbean0364 It can be as simple as changing the engine oil or you may need to clean or replace the camshaft oil control valve (easy DIY for most cars)

[@MacoM1983]

M having this problem in my one year old Hyundai tucson 2.0 and it struggles especially during initial gears . Also hearing engine noise

[@ProfessorDIY]

Sounds like transmission issue maybe the shift solenoid if you are lucky

[@JASONHN]

I have a 2012 Kia Optima hybrid and when I'm in traffic or I stop a lot and the gasoline engine starts, it revs a lot up to 5k RPM without me doing it and then it gives a thump because it returns to normal... Can someone tell me what problem it may have? It only happens when the normal motor is turned on, with the electric one I have no problem

[@ProfessorDIY]

Unfortunately I have never owned a KIA and I do not know much about them, but it sounds to me like a sensor issue

[@alexanderlusco8094]

My 2003 accord under pedal to the metal acceleration sometimes won’t kick all the way to full throttle, or sounds like it sits at half power at full throttle, also under hard acceleration above 2 year it will rev as high as possible fast, but you hear the pressure like cut out and come back and cut out, like a you don’t hear the exhaust anymore, as if it’s running and something getitng partially clogged at full throttle. I’m really confused, cleaned fuel system and new plugs, but thinking the cat may be getting clogged or my injector or pump and filter may be dirty, I don’t know can you help?

[@ProfessorDIY]

I would check the throttle positioning sensor

[@Amahyze777]

Ever got it fixed?

[@steveemerson5507]

Maybe you could help me. 5.7 hemi druve by wire, rough idle poor acceleration at slow speeds,but when i floor it ,it runs great.

[@ProfessorDIY]

Sounds like an idle control valve but I would also check the MAF and the air filter

[@spike8896]

My Ford Fiesta ST Line has the following error while accelerating - ‘Brake applied, power reduced’. Handbrake is definitely off, what could be causing this?

[@ProfessorDIY]

souds like a sensor to mre unless you are accidentally press both pedals at the same time

[@willbernhardt8007]

I notice between 1500-2000 RPM when I'm maintaining a certain speed is when I start getting this hesitation. ( No engine light)

[@ProfessorDIY]

That might be your throttle position sensor

[@BeeGee7719]

So my Fiat manual transmission is starting to hesitate from 2nd to 3rd during acceleration. Any suggestions? Thanks No check engine light

[@ProfessorDIY]

If it only does it in that instance start with throttle position sensors and air filters MAF sensor

[@papichulo9705]

my nissan frontier has been having check light on for years it has random misfire code i change distribuidor coils wires spark plugs mag sensor and idk what else to do anymore the catalytic converter might be clogged tho it smells like pure gas so idk what you thinkg

[@ProfessorDIY]

Smell of gas indicates you car is running rich and that can cause misfires

[@9Francois6]

P1335 -Engine torque monitor- control limit exceeded - error code on vw golf mk5 gti. Hesitation on low rev acceleration but fine on higher revs and higher speeds. Almost like something is not opening to allow air to flow and causing turbo to flutter. Help needed please?!

[@ProfessorDIY]

sounds like a module/sensor fault

[@royhetteagapito5295]

Hi! Im facing poor acceleration in my first 20-30 mins of drive but works properly after 20-30. Already changed my spark plugs. What should I look next? Thanks!

[@ProfessorDIY]

Your intake temperature control sensor, possible air leaks, and the mixture control valve

[@CLAPPII242]

Hello I have a 2013 Hyundai Sonata gls and when I start the car it runs then after a couple seconds it shakes and turns off. Wanted to know if the MAF sensor might be the culprit for this

[@ProfessorDIY]

It can but also I would suspect the Idle control valve

[@CLAPPII242]

@@ProfessorDIY appreciate the response I’ll check that as well

[@ProfessorDIY]

@@CLAPPII242 Anytime

[@chrisgranito3200]

I have a 2012 Silverado with the 5.3 had misfire issues changed plugs and wires and still getting them randomly should I try this?

[@ProfessorDIY]

Most certainly and Good luck!

[@bjjones18]

Clean your throttle body

[@ProfessorDIY]

@@bjjones18 No need problem is solved

[@JamykaBailey]

The first sensor is a MAF sensor. What is the second sensor called??

[@ProfessorDIY]

It is the throttle positioning sensor, some vehicles also have an air temperature sensor that is located close to the intake manifold

[@brianwalugembe9096]

My gti 2012 had me stressing with same problem , bought scanner and ended up misfiring on cylinder 2 , bought new coil pack replaced and now drives like new and no more misfire even on cold start in morning

[@ProfessorDIY]

The most common misfire cause is sparkplugs, followed by coils and then air issues like MAF

[@ckbond41]

@@ProfessorDIY I have this same problem but I thought it could be carbon build up as well, I am getting error P0300, P0301 and P0303. I changed the coil packs for both of them and a fuel injector for cylinder one and it's still giving me misfire. I would like to know could it be the compression in those cylinder or Manifold. Oh by the way, I have a VW Golf 1.4tsi.

[@ProfessorDIY]

@@ckbond41 what model and year is your car?

[@ckbond41]

@@ProfessorDIY its a 2015

[@ckbond41]

@@ProfessorDIY It's a Golf 2015.

[@ifvideotitleswerehonest]

i have a 1997 integra LS auto as a daily and ive been having an issue where it turns on first try no problem everything is great, computer reads 0 codes, but when its time to drive off weather im backing out of the drive way or just driving forward pushing the pedal down makes RPMs bounce at very low levels before stalling on me and when i turn the key off and turn my car back on it fires right back up and i cannot seems to find a stable fix, i have tried resetting my ECU, checked my ground cables no problems and im not sure what it could be but i also wouldnt want it to be a $50 - $100 fix and me take it to a mechanic and let them charge me $500 for something that wasnt there

[@ProfessorDIY]

That sounds like an idle control issue - have you tries to adjust the throttle

[@ifvideotitleswerehonest]

@@ProfessorDIY im going to clean the IACV and re-adjust the throttle and see if that makes a difference, thanks man! wish me luck

[@ExoticGTRX]

​@@ifvideotitleswerehonestdid it work?

[@lucaswedsted8919]

Hello, my RSX auto is having a problem under acceleration. When under acceleration it will sometimes hesitate. Mostly happens a ton after a startup, but happens randomly too. No check engine light. Can’t tell what’s up. Do you mind pointing me in the right direction?

[@user-wt1rv3cn9m]

Make sure PCV Valve is good and snug and in working order helped mine

[@ProfessorDIY]

PCB Valve does not cause the symptoms we are talking about

[@LowisRz]

I got a p0505 and p1001 my maf sensor voltage is good but my g/s is over 15 and should be @1-2g/s

[@ProfessorDIY]

clean air filter and no vacuum leaks?

[@LowisRz]

@@ProfessorDIY i have a tear on my intake duct after the maf but i put duct tape on it do u think it would still read wrong?

[@ProfessorDIY]

@@LowisRz yes it is almost ceratin it reads wriong -

[@michaelherman3809]

2014 Subaru Impreza WRX. Car is totally fine until i drop to a lower gear & put it under heavy load. As soon as its above probably 5k RPMs it feels like its kicking back & hesistating & there is a big loss in power.. But it doesnt feel like a full on misfire. No codes popping up, either. Got any suggestions? Also, I did clean my map sensor but it did not help

[@ProfessorDIY]

How old are your spark plugs? Hoe many miles on the engine?

[@michaelherman3809]

83k miles. Not sure if the spark plugs are original, I actually purchased the car pre-owned at 81k

[@ProfessorDIY]

@@michaelherman3809 For a used car assume they are original, start by replacing spark plugs, it is a maintenance item and a common cause of your symptoms.

[@michaelherman3809]

Appreciate it! Will have to take it in because of the location of the spark plugs

[@ProfessorDIY]

Sorry that sucks!@@michaelherman3809

[@Genesfilm]

I have an Audi rs3 and I’ve noticed on 100 percent throttle it kinda sputters and breaks up. And I have no check engine light . My spark plugs are clean no oil or anything on them . They have around 17 k miles on them. What should I look for?

[@ProfessorDIY]

Your Mass Air Flow and your idle control valve

[@ProfessorDIY]

Clean your MAF and the Air Temp sensor, also is your air filter clean?

[@ProfessorDIY]

@The Trashman Nope ignition coil is fine and it is a TOYOTA

[@ProfessorDIY]

@The Trashman Your comment come under the main video not in reference to another post when I replied to it and there is no reason to be obnoxious

[@rockyhutton6850]

Hello, did you manage to get your issue sorted, I have the same problem with my golf 5 gti, drives well but on a well push acceleration it sputters, if I keep acceleration it really does not have power to accelerate and will read multiple misfire

[@khyrahoete3270]

My 2000 Honda civic eu1 jerks when going between 0-30km/h then it’s fine until I come up to a hill or start applying heavy throttle it starts to hesitate what’s the some problems that may cause this and what can I do to troubleshoot and fix if lucky

[@ProfessorDIY]

Misfires can be caused by many reasons if it only happens during acceleration I would check/clean the MAF then the ICV then spark plugs if nothing works so far check the throttle position sensor followed by ignition coils and lastly fuel injectors

[@gorkman5697]

hi did you solve the problem i have similar problem with toyota yaris cross

[@ProfessorDIY]

@@gorkman5697 Yes of course I did

[@carlodonnell146]

A bad narrow band O2 sensor can also cause stalling when moving off from stop as it did with my 2001 Dodge Ram some years ago; I replaced the sensor and it fixed it; of course my van has a speed density engine = MAP engine NOT a mass airflow=MAF engine.

[@ProfessorDIY]

It is rather uncommon to do so especially with out engine codes

[@carlodonnell146]

thanks for the response I dont remember if codes were present but replacing the sensor solved the problem...I learnt it from other sources .....Im not a total newbie,@@ProfessorDIY

[@ProfessorDIY]

@@carlodonnell146 I did not sufggest that you were - however a bad O2 sensor is not a common cause for these symptoms and it always trigger a code

[@carlodonnell146]

@@ProfessorDIY thanks for the back and forth

[@ProfessorDIY]

@@carlodonnell146 Of course I do these videos for you guys!

[@jessieg.6720]

Hello I have a problem with my 2014 Nissan pathfinder. When driving and accelerating it doesn’t go or it won’t pass 20 mph after trying to go any higher mph it’ll start shaking really bad and eventually driving it longer it’ll become overheated. When accelerating it’ll sound like it’s screaming to go. Please help.

[@jessieg.6720]

Also when driving the engine light will blink

[@ProfessorDIY]

Check your oil, transmission, and coolant lines for any contamination, you appear to have multiple issues going on

[@thandonkosi1996]

I have a chevy aveo it over revs it self what could be the problem

[@ProfessorDIY]

It is pretty much the same for all naturally aspirated cars, clean your MAF sensor and the throttle body, and lastly clean the idle control valve.

[@jalilbangash9745]

Hi boss i have Nissan qashqai 2.0 model 2008 Sence one week facing a long staring time which abnormal in my practice as previous routine Some time i feel dropping and jerking of engine RPM during on road driving speed Also when i stop on signal car engine goes off Than i push to stert engine become to start One think i also observed car coolant also become low I hope u r give me a good and nice repair suggestions With thinks

[@ProfessorDIY]

check your throttle position sensor and clean the throttle nody

[@donavanpretorius6585]

My ford figo also hesitate when accelerating. Also heavy on fuel. No codes. Idle and start perfectly

[@ProfessorDIY]

Based on what you describe I would check/clean yjr MAF the mixture control and the throttle position sensor

[@gracefitzgerald3286]

My Ford focus 1.4 2007 is losing acceleration on take off I feel the car is not reaching full power when I accelerate, can you help.. from Dublin Ireland 🇨🇮

[@ProfessorDIY]

I would check and if needed replace the Throttle position sensor

[@chikaijita1597]

Your exhaust could be clogged

[@sheniceebanks7661]

Hello i came across your video..and i need to ask a question..hope you can help me figure it out..here goes.. I have a 1997 nissan bluebird u14..am having trouble accelerating whether on flat or uphill..the car would just buffle and vibrate like it want to shut down.

[@ProfessorDIY]

Does it idle well? More information is needed. But checking/cleaning the MAF and ICV is a good start

[@sheniceebanks7661]

@@ProfessorDIY idle yes but with delay..or sounding like sputtering..puff,puff that's what am getting whether in park,reverse or drive same problem..its just puff,puff,puff

[@ProfessorDIY]

@@sheniceebanks7661 Fuel filter also a good place to check, how many miles? Last time you tuned it up?

[@sheniceebanks7661]

@@ProfessorDIY I change gas pump 2months ago,air and gas filter,leads wire and still its there..my husband also clean the trottle body and the problem persist..the mechanic at this moment I think is just guessing..I changed all he suggested and still....

[@ProfessorDIY]

@@sheniceebanks7661 Throttle position sensor is a strong possibility

[@m1cajah]

My 2007 Tahoe (220k) only has the acceleration hesitation when the AC is on. Wondering what that could be? AC Compressor/Condenser maybe? No codes.

[@ProfessorDIY]

That is a weird one but still likely suspects are air/vacuum system

[@m1cajah]

@@ProfessorDIY Turned out to be the (accelerator) pedal position sensor. I just replaced the whole accelerator pedal assembly and it went away (so far). The AC being on wasn't related, as it also did it late this fall when I was just running the vents.

[@ProfessorDIY]

@@m1cajah thank you for the update!

[@m1cajah]

@@ProfessorDIY You're very welcome! Once I told my local mechanic friend that it was limiting me to 1500rpm on acceleration he told me "you're in limp home mode" and to change the pedal sensor/assembly and it should be good to go. About $40 and 10 minutes of my time and it's been good so far.

[@ProfessorDIY]

@@m1cajah many people do not even know that thrirle position and petal position throtles exist - somre mechanics take advantage of this

[@angelonpluto2199]

I don’t know but my Altima 2012 started thrusting everything I push the gas and my rpm keeps making a noise and it goes up and down any help works

[@Drgottagupta]

Same here when I push the gas, it’ll jerk/buck anytime I push or release the gas pedal.

[@ProfessorDIY]

I would start with cleaning the MAF and throttle body. Then inspect and if needed replace the air filter

[@ProfessorDIY]

I would start with cleaning the MAF and throttle body. Then inspect and if needed replace the air filter

[@brianwalugembe9096]

He dont know if its late but got gti 6 2012 dsg , am having bad misfire on hard acceleration, not on neutral only when am driving, but if i accelerate slowly it doesn't likely to missfire What could be problem Thanks

[@brianwalugembe9096]

If I continue hard accelerate then triggers epc light and engine misfires badly then switch off and start again back to normal

[@ProfessorDIY]

It can be a throttle position sensor or even a dirty air filter

[@brianwalugembe9096]

@@ProfessorDIY thanks buddy but it was cylinder 2 coilpack , changed new one runs great now , had misfire on cold start went away as well

[@ProfessorDIY]

@@brianwalugembe9096 In general spark plugs and coils are the first things to check or change when you have misfires, glad you fixed it!

[@jayliu7786]

my 2017 nissan versa note driven about 89,000 miles hesitates when accelerating past 60 miles per hour on the highway. the car shudders as i try to push it past 65 miles per hour. after some time, i can drive it at 65 miles per hour but it only goes for a mile before the speed falls back to 60 miles per hour. it's hard to keep it at 65. sometimes it'll fall to 40 miles per hour

[@ProfessorDIY]

Sounds like an air/fuel mixture issue. Check your MAF and your air filter

[@jayliu7786]

@@ProfessorDIY thanks so much 💜

[@johnmakola7068]

My car it's got high and rough idle when iam accelerate it lost the power its a vw polo bujwa 1.6

[@cartersbuild8531]

My 2014 f150 drives fine but when I go half throttle almost full throttle feels like it’s in limp mode idk what it is

[@ProfessorDIY]

It could be a throtle position switch or even your acceleratoe petal switch, sorry I am not very familiar with FORD vehicles

[@Yooisam]

My 2018 Silverado has this problem, the Pedel gets hard when I reach 40 mph

[@ProfessorDIY]

That seems like a different issue do you know if you have a pedal positioning sensor or if you can adjust the tension on your throttle body?

[@Yooisam]

@@ProfessorDIY I’m not sure to be honest, I just got the truck , is a 2018 Silverado z71

[@lindeliwenkosi6844]

My Nissan micra 2012 wont rev past 2000km but it starts very well what could be the problem

[@ProfessorDIY]

The throttle position sensor or accelerator pedal position sensor alternatively air system leaks or dirty air filter/MAF

[@kenzienrj]

My 2004 mazda 3 2.3l cuts out on full throttle some times and then sometimes it’s fine it’s a 5 speed manual and has exhaust so I don’t think my cats clogged but I’m very confused cause there’s no code and it’s cuts out on full throttle but is fine half throttle and normal driving

[@ProfessorDIY]

Make sure you have good exhaust flow it can be a blocked cat

[@duaneafields]

did you ever fix your car? what was it, mine is doing the same. thanks.

[@ProfessorDIY]

@@duaneafields Yes after the MAF and the throttle body were cleaned the car performed much better a final tune-up made it run like new

[@kenzienrj]

I fixed my problem it was the maf wiring had to cut open the harness and find it

[@kenzienrj]

Also my Mazda kinda stright piped itself so I got no cats but is it normal for it to smoke bluish at high rpm’s

[@andreisenchiu2391]

Hey, i got one hell of a problem. My car (2.0 tsi vw passat b7) is reporting a rich mixture both at idle and off idle. When stationary, the revs drop and sometimes even the engine dies. Cold starts are very rough (revs fluctuate anywhere between 500 and 1100ish rpms) but only for 10 to 20 seconds. Odd, right? Now the funny thing is, all of these problems only occur in HOT WEATHER. Yup,only if there are 20 or more celcius degrees. Whenever i drive my car in the winter, mostly sub 10 celcius degrees, my car runs perfectly fine every single time. well..at least the 3 to 4 months while it's cold outside. I have tried fixing the problem for multiple years. Even rebuilt the engine. Changed fuel pump, fuel control module, inspected evap system, pcv valve, spark plugs, ignition coils, Nothing seems to help. However, i did i tiny experiment. I noticed there is way too much air drawn from the pcv valve to the intake manifold. So i added a reduction valve. My idle problems went away (not completly but it's better) but now there is an hesitation when i press the gas pedal when i want to get moving from a stationary position. My theory is that there is something wrong inside the intake manifold and my car tried to compensate for the missing air (probably caused by a stuck valve,flap inside the intake manifold) by drawing too much air from the pcv valve. I don't know..i am completly lost. Any ideas? Sorry for any english mistakes

[@ProfessorDIY]

Based on your symptoms I would suspect a throttle position sensor have you checked it?

[@andreisenchiu2391]

@@ProfessorDIY shouldn't be there a cel code?

[@ProfessorDIY]

@@andreisenchiu2391 Not always

[@andreisenchiu2391]

@ProfessorDIY so based on my reader the throttle position is 17% when engine is off, 13% at idle and goes to a maximum of 87%. However, if i press the gas pedal when the engine is off, it drops from 17% to 12%. Anything unusual?

[@ProfessorDIY]

@@andreisenchiu2391 Yes your pedal position sensor might be faulty as well.

[@robin-action1394]

What happened I try to accelerate on low gear, but is not responding, but on high speed it work fine, immediately engine sign show on my dashboard, my acceleration will stop working, it look very loss as of air and after some time it pick and stop making it very hard to accelerate on low gear or speed , like accelerating being in traffic

[@ProfessorDIY]

I would check the throttle position sensor and the throttle control valve

[@robin-action1394]

@@ProfessorDIY thanks for your reply I really appreciate, please if more information on what to do because immediately the sign come out on dashboard, accelerating on low gear like on traffic etc because very hard or experiencing fraction in the Tyler , ie like not moving smoothly or something pulling it back, but immediately the car is off and you switch it on again the sign will remove and the car will start moving well , but not to a far distance before it display again

[@robin-action1394]

@@ProfessorDIY thanks for your reply I really appreciate, please if more information on what to do because immediately the sign come out on dashboard, accelerating on low gear like on traffic etc because very hard or experiencing fraction in the Tyler , ie like not moving smoothly or something pulling it back, but immediately the car is off and you switch it on again the sign will remove and the car will start moving well , but not to a far distance before it display again

[@ProfessorDIY]

@@robin-action1394 Did you try the throttle position sensor?

[@shairafzalkhan3106]

my car don't accelerate until the accelerator is pressed hard. when I press it hard, the car starts running. once it starts running then a small push of the accelerator is enough to run it. when the car slows down again a hard push to the accelerator is required. when the car is running fast, then this problem doesn't exist. This problem exists when my car is running slowly so what do you think could be the problem

[@ProfessorDIY]

Based on your symptoms I would check your accelerator position sensor and the throttle position sensor first

[@osamahadwan316]

My car accelerates, but after 3k rpm the car starts to lose power and shake abit, what the problem?would be appreciated for your answer

[@ProfessorDIY]

I would start with the air system. Air filter, MAF, and vacuum leaks. Then a would check test the throttle position sensor

[@IsaacClay]

Okay so my 05 hinda civic has a problem where it starts right up cold and randomly cuts off after warm and takes a few hrs to crank again jerks badly under heavy acceleration and becomes less powerful

[@ProfessorDIY]

I would start with spark plugs do you have any codes?

[@IsaacClay]

@Professor DIY no I have no codes at all but it seems to be fuel related but I can start with plugs first

[@IsaacClay]

Car sat up for quite sometime from the ppl I bought it from do to this issue

[@samgrieg2542]

That other sensor looked like MAP (manifold absolute pressure) sensor

[@ProfessorDIY]

The 4runner does not have a MAP however

[@samgrieg2542]

@@ProfessorDIYoh I thought it was vw CC in the video

[@ProfessorDIY]

@@samgrieg2542 No the cc has very different-looking sensors and is more modern!

[@rommelrodrigo6146]

Altis 2002, automatic. Above 120 km/hr hesitates acceleration.

[@ProfessorDIY]

Try cleaning your MAF

[@monstermind4286]

I have a toyota camry 2018 se 2.5l I have misfire cyl 2. Code and also random misfire I believe p3000 I have new fuel pump and filter. New Injectors.. new spark plugs. swapped coils to check if it changes to different cylinder code. Checked leakage for valves. Good. Intake sensor good. MAF sensor is good. Haven't checked compression. But when I disconnect cylinder 2 while misfiring it doesn't change meaning seems that exactly still the area where the problem resides. All others (1,3,4) when disconnected cause it to misfire even more.. I do also get engine power reduced sign on dash. May my 02 sensor for any faulty reason possibly be causing my ECU to think it's running rich or lean and be causing the random misfire and the specific cylinder 2 misfire?? Without popping up a 02 sensor code on OBD 2 scanner???

[@ProfessorDIY]

Did you also check for pending codes or just active/stored codes? Also did you check your ait filter and throttle position sensor?

[@monstermind4286]

@ProfessorDIY I reset codes everytime and rerun the car. Same codes keep coming up. And yes I checked air filter and cleaned throttle position sensor. Any tips from here?

[@ProfessorDIY]

@@monstermind4286 I would check the injectors starting with the known misfiring culinder

[@monstermind4286]

@ProfessorDIY I have put all new for injectors. And all 4 new spark plugs. I did swap the coils from second cylinder to first cylinder, but the code comes up on second cylinder still. One important thing that might help was you. Giving me some help is the car starts good, but as soon as I give it some acceleration out on the freeway to push-up to like 40 Miles an hour, it misfires slightly up to 40 and from 40 to 60 Miles an hour it will. Start to miss fire And then the engine loses its power, no matter how far I push down the pedal. When I get back now, when I disconnect second cylinder, it doesn't make a difference on misfire. As if the second cylinder is dead, one way or another. I'm cleaning the oxygen sensor right now. Any other ideas are very welcome. I still appreciate you.

[@ProfessorDIY]

You replaced both injectors and coils?

[@LoriGuttilla]

My 2005 3.0 Sable ls Duratec engine, had the ac compressor replaced, and after that, is being hesiting and loosing power after 1 hour driving. There's no check engine light on, there's no noise. I changed the spark plugs and coils, air filter, had the oil changed before the compressor was replaced. The car never did any of that before the compressor was changed. What could be causing this,since there's no check engine light on. Anyone, please help..

[@ProfessorDIY]

did you change the alternator or a shop?

[@didarden]

Crank shaft?

[@ProfessorDIY]

yes?!?

[@Benjilow109]

Hey my audi 2.0 turbo hesitates/rpm/car jump up and down when press gas after a complete stop. Already cleaned the maf sensor did all sparkplug and coils . Still has problem

[@ProfessorDIY]

Not quite sure what you are describing but if your RPM is erratic I would check all Wiring and the throttle position sensor

[@Benjilow109]

@@ProfessorDIY hi i try to explain better so the audi jerks/hesitates for a few seconds when i press the gas after a stop. After it goes into second gear it is smooth

[@ProfessorDIY]

@@Benjilow109 Sounds like either a fuel /air mixture or metering issue check your throttle position sensor that idle control valve and the throttle body

[@Benjilow109]

@@ProfessorDIY will do thanks Professor

[@ProfessorDIY]

@@Benjilow109 let me know how it goes

[@EFamz]

Wierddd it is my birthday thank you 😂😂😂

[@ProfessorDIY]

Happy Birthday!

[@EFamz]

thank youuuu sm @@ProfessorDIY

[@juanamaro07]

I have a 2010 toyota corolla. When im stuck in heavy snow and smash the accelerator it will lose power and stop accelerating slowly by itself

[@ProfessorDIY]

Does it have traction control? Does the engine light blink when it happens?

[@juanamaro07]

@ProfessorDIY engine light doesn't blink but traction control blinks quick

[@user-ry9bu9of1m]

My truck sometimes runs strong and other times it has sluggish acceleration

[@ProfessorDIY]

check/replace your air filter and MAF clean throttle position sensor

[@cjbongalon2064]

My ford fiesta s is doing the same....

[@ProfessorDIY]

Try what we show here

[@dondada1949]

My car stalls immediately after pressing the gas pedal. What caused this?

[@ProfessorDIY]

Can be many things what other symptoms do you have? Does it idle between 800 and 1000 RPM?

[@dondada1949]

@@ProfessorDIY No. This is a perfect example. While I was in traffic the other day, my foot was on the brake and after releasing the brake and hitting the gas pedal the car surges back and forth slightly before moving

[@FedkaSlovanich]

2015 subaru forester, no power until it hits 3k, almost as if it is turbo charged except it isnt.

[@ProfessorDIY]

Sound like air system (ie MAF, air filter) any other symptoms?

[@user-kn9fb3uh4o]

Hello i have a 1995 honda accord ex. It doesnt accelerate past 5000 rpm's, shakes aggreaively, takes a while to shift past 1st gear and wont leave 2nd. It aslo has a very aggresive shift.

[@ProfessorDIY]

What you describe is consistent with transmission, replace the ATF as soon as possible and hope for the best

[@nyctopic8054]

My car was driving perfect yesterday today it’s going so slow I don’t know why help

[@ProfessorDIY]

What other symptoms does your car have?

[@mark.r8900]

Hi, my automatic 2007 audi a4 quattro 2.0L turbo has acceleration issues. It cranks and starts fine. But intermittently on a flat road it doesn't have power to accelerate when i pressed on gas pedal. When i tried flooring the gas pedal the rpm just goes up to about 4000 before gear shifted. On a light hill it struggles so much. Rpm would just get stucked at 3000 no matter how hard i push the gas pedal. So far i have changed fuel filter, new sparks and coil, maf sensor and cleaned throttle body. I hope it's not the transmission. Any help would be greatly appreciated. Thank you.

[@ProfessorDIY]

Have you checked the throttle position sensor?

[@mark.r8900]

Thank you for your reply. I believe for my car the sensor is built in the throttle body assembly. However I do see a sensor similar to the one in your video. Not the MAF but the other one with 2 pins. Is the the TPS? Thanks

[@ProfessorDIY]

@@mark.r8900 yes it is :)

[@jamesschmidt1120]

this could be clogged exhaust

[@ProfessorDIY]

@@jamesschmidt1120 Nope, clogged exhaust feels quite different and has symptoms when starting or fiddling as well unlike the scenario we are talking about here

[@mbuyekezozwelifile8370]

My hyundai i30 2010 1.6 cutting off the engine while driving & struggling to start

[@ProfessorDIY]

is your engine light on or the car misfires?

[@mbuyekezozwelifile8370]

The is no engine light the only thing i notice is less power on ecceleration or hesitation

[@beyondsakai]

you dont need to buy specific cleaner, just use alcohal is good enough.

[@ProfessorDIY]

You do that, people that want to do it the correct way should buy the correct cleaner

[@jorgedominguez1957]

Now I realized that I put a full tank of gas in a place that I never went before and every since I got that gas my car starting to hesitate when I give gas, could that be the problem?

[@ProfessorDIY]

yes most certainly - put some octane booster in your tank

[@jorgedominguez1957]

@@ProfessorDIY Will do thanks, apreciate it

[@13ansoy65]

Hi, please help In a hard stop, my car wont go forward till I press the gas pedal to the floor, in other senario from a parking, I shift it to drive with no pressing the gas pedal, it forwards but when I shift it to drive with pressing the the gas normally like 10% to 20% it stops till I press it a 100% again then it forwards [Automatic car] Changed/Replaced: -Transmission oil -Engine oil -Oil Filter -Air Filter -PCV -IACV -MAF -TPS -O2s -Spark plugs -Battery Cleaned: -Catalytic -Exaust -Throttle body What else I'll do, I have still the delay acceleration from hard stop. . .Hope this comment will be notice :) :) :)

[@ProfessorDIY]

check the accelerator position switch and clean or replace if needed, also throttle position switch

[@razzalee305]

Check ignition coil and injectors, and change air filter if the hesitation is random then just change the injectors

[@razzalee305]

I should ask did your check light flash on the dashboard at sny time

[@ProfessorDIY]

@@razzalee305 If you mean the check engine light I address that in the video

[@ProfessorDIY]

@@razzalee305 nope the injectors should be the last thing you do

[@nelrellama4943]

Hello, my car is hesitating between 3-5k rpm i tried replacing the spark plugs, fuel filter , new battery, and i even adjust the distributor timing. My car is Honda Civic Vti (2000) im running out of ideas. Thank you

[@ProfessorDIY]

Thr specific range of RPM would lead me to check the throttle position sensor first

[@nelrellama4943]

@@ProfessorDIY thank you so much!! I tried it and now the car is running great!

[@ProfessorDIY]

@@nelrellama4943 Glad to be able to help you!

[@user-ge9ux4dj5p]

My 2004 gmc envoy spudders on acceleration for a few seconds. Enough to jerk the vehicle for a brief time. No CEL. What could it be?

[@ProfessorDIY]

Start with the simple first like the air filter and such then Clean the throttle body, MAF sensor, and if not resolved middle control and throttle position sensor

[@MrsRight96]

My car accelerates then lose its acceleration

[@ProfessorDIY]

What other symptoms are present?

[@itzpro.]

Thats a fuel problem ma'am check it from gas tank till the engine whatever it connects the fuel to ....All that if you dont have a obd2 reader to read fault codes

[@kylezLand]

@@itzpro.thanx !! Your comment helped me

[@priss88hdz]

@@itzpro.mine does the same thing, I have a 2008 Nissan quest. I’ll check that out. Is there anything else I need to check?

[@itzpro.]

@@priss88hdz airflow sensor...disconnect it and check it the last thing is if you have clogged exhaust this one is almost impossible to diagnose

[@Trey-sd6dz]

Man I have my 2001 Chevy Silverado in limp mod won’t go above 20 mph

[@ProfessorDIY]

any codes? what symptoms?

[@Trey-sd6dz]

@@ProfessorDIY when I go to accelerate or stomp on the gas it won’t go above 25 mph but the rpm gage will go up

[@ProfessorDIY]

@@Trey-sd6dz do you hear any npices frpm the transmission?

[@barryrenouf3450]

I use brake cleaner and it works fine. Where is your proof that you have to use mass air flow sensor cleaner?

[@ProfessorDIY]

In the simple fact that the main element is easily dissolved, and maybe you are lucky so far, but it would be irresponsible to not advise people that they should use only the appropriate chemical

[@barryrenouf3450]

@@ProfessorDIY I repeat: show me your proof?

[@ProfessorDIY]

@@barryrenouf3450 Show me your proof that it does not. And my proof is based on knowledge, when the designers of something tell you not to use anything but specified cleaner and automakers invalidate warranties for doing so that is what people should do, why would you risk it? and even in your case how do you know that you have not damaged your sensor?

[@vikingsmb]

need to top up your coolant mate

[@ProfessorDIY]

Why?