This Corolla Came From 2 Shops & Still not Fixed - P1605, P0171 Diagnosis

[@imagingconcepts]

I worked within Dealership Service Departments for 35 years, now retired and I can tell you, running across technicians of your caliber is like finding a 4 leaf clover or a unicorn. You Sir are a credit to your profession and I hope you find all the success that a hard working, dedicated man like yourself deserves.

[@KITS_Auto_and_Truck_Repair]

@imagingconcepts Thank you so much, I appreciate it!

[@fredbennett3549]

​​@@KITS_Auto_and_Truck_Repairthey can be a good mechanic but if you can't diagnose the problem that's what make them fall short in the business, good work brother 👍

[@lupedelacruz4152]

Great class for all of us amigo en Merry Christmas

[@johnnypetro9314]

I love this! People coming together to solve problems and share it with the world.

[@KITS_Auto_and_Truck_Repair]

@johnnypetro9314 Thank you!

[@keltecshooter]

I've been a technician over 30 years now, I really enjoy videos from the next generation of young men and women in the field. Well done

[@KITS_Auto_and_Truck_Repair]

@keltecshooter Thank you Sir! I appreciate it!

[@ebrahimahmed2291]

I need to learn this but I live in Chicago

[@everrolmalcolm2933]

Great diagnostic of the fuel system on the Corolla..

[@KITS_Auto_and_Truck_Repair]

@everrolmalcolm2933 Thank you!

[@seunfire]

My african brother you don't know how your videos have helped me at my autoshop in Nigeria. This one is a special appreciation post this man deserves his flower's 🎉

[@KITS_Auto_and_Truck_Repair]

@seunfire Thank you my African Brother from Nigeria, I'm so happy to hear that!

[@salaudeenolafimihan1121]

Greetings from Nigeria

[@zavierjr876]

@@KITS_Auto_and_Truck_Repairyou’re from Haiti I can tell your accent.

[@IvanHVAC]

​@@zavierjr876or Jamaica

[@chacha2585]

Definitely one of the best technicians on KZbin. The guy is worth gold! Very detailed and thorough in his explanation. He has helped me tremendously allowing me to eliminate certain factors I was concerned about regarding P0171, which is a pain in the butt code which leads to all sorts of other codes to appear.. I’m a big fan of this guy and will be following him day in and day out. In a short span of time, I have learned so many things from him. Thank you so much for sharing your knowledge and experience to all of us. God Bless!

[@KITS_Auto_and_Truck_Repair]

@chacha2585 Thank you!

[@fairybread6072]

All I have for you is great job. We all need a trusted Mechanic.

[@KITS_Auto_and_Truck_Repair]

@fairybread6072 Thank you!

[@wsnxumalo6707]

Wow your friend is amazing, its not rare a machanic seeks machanism assistance to another machanic, its true when they say united we stand and divided we fall!!

[@KITS_Auto_and_Truck_Repair]

@wsnxumalo6707 Yes! he has become a good friend!

[@505fastlife6]

Im a mechanic with 3 years experience and i learn alot from your videos it has helped me with my career, i look like the smart guy at work thanks to you.

[@KITS_Auto_and_Truck_Repair]

@505fastlife6 My Pleasure! I'm so happy tto hear this! thanks for telling me how the videos have been helpful to you!

[@lionelngenzi3997]

Hey , am an African automobile student. Thanks brother I do get more knowledge out from your videos , they do help a lot on my enternship

[@KITS_Auto_and_Truck_Repair]

@lionelngenzi3997 My Pleasure! I'm glad to hear that

[@101thenuke]

What a friendly and Knowledgable young man. 👍

[@KITS_Auto_and_Truck_Repair]

@101thenuke Thank you!

[@fenwickchinkhwangwa3278]

Your skill is amazing sir!! Now I understand about the fuel trims.The way you explain things is like a professor. You need to open a school for to teach and share the knowledge you have my brother.❤

[@KITS_Auto_and_Truck_Repair]

@fenwickchinkhwangwa3278 Thank you!

[@Cesium67]

Thank you for showing the little details with narration of diagnostics.

[@KITS_Auto_and_Truck_Repair]

@Cesium67 My Pleasure!

[@sulltanarif1]

You are the best fault code reader,it is not easy to learn all the diagnosis functions..you are expert.

[@KITS_Auto_and_Truck_Repair]

@sulltanarif1 Thank you!

[@vikramvij1245]

I work as truck mechanic the same way my supervisor explain. F--k so simple and clear to diagnose. I m your subscriber now ❤. Great

[@KITS_Auto_and_Truck_Repair]

@vikramvij1245 Thank you, Welcome to our youtube community!

[@DavidMartin-hv3mn]

I love the calm and relaxed explanations. You make a very good teacher.

[@KITS_Auto_and_Truck_Repair]

@DavidMartin-hv3mn Thank you!

[@reubenmiller7988]

Diagnose Dan and South Main Auto references in the same video. Good work!

[@KITS_Auto_and_Truck_Repair]

@reubenmiller7988 Lol! Thanks

[@grominwithrob1339]

This is easily the best video I have ever seen. It perfectly explains the relationship between fuel trims, and o2 sensors, fuel supply, air and vacuum. I just went through my truck chasing a no code misfire and very bad fuel trims. I found a point where my fuel psi would completely drop to zero and spike back up. I found my ACDelco fuel pump purchased one year ago that only has 6k miles on it has a low fuel pressure with random drops. Wiring between the fuel pump control module look better than they should for their age. 😂. Voltage to pump is strong and constant. Now I am waiting for my warranty replacement and trying to burn up all the fuel in the tank. At least when I was in there last, I replaced all the fuel lines. I am going to inspect the wiring very closely when I get that tank dropped. I have heard that can be a problem point for gm trucks. Great video!!!

[@KITS_Auto_and_Truck_Repair]

@grominwithrob1339 Thank you! Good luck with your vehicle

[@grominwithrob1339]

@@KITS_Auto_and_Truck_Repair Oh oh, I was on my way home and thinking about what you had discussed in this video. Short term fuel trims were pretty good but long term wher 14 and 11. I gave it some gas and the long term fuel trims dropped quickly. As soon as I got to a stop light the long term fuel trims jumped. It seems I must have a vacuum leak. At least I have a direction I can look into my next day off. Looks like I am going to use a fluid transferring pump and a cigar and hopefully find my leak. Thank you so much for the video, it taught me a new trick and just may of helped me fix my truck. 🙏😂

[@juanrodriguez-ry6yt]

I started to clean fuel tanks before replacing pumps to avoid come backs

[@medoveee7445]

I wish I saw your channel earlier. Anyways, I'm here and learning a lot from you. Thank you.

[@KITS_Auto_and_Truck_Repair]

@medoveee7445 My Pleasure!

[@abcdefhijkk]

men you are real good mecahnic ........lots of them lazy dosent want take the time and do the inspection....always they say is replace this and that and nothing fix

[@KITS_Auto_and_Truck_Repair]

@abcdefhijkk Thank you!

[@abcdefhijkk]

@@KITS_Auto_and_Truck_Repair thanks bro !!! you are the best !!!

[@Jahlive-q7y]

Genius in the auto technician industry bro learn a lot from this video

[@KITS_Auto_and_Truck_Repair]

@Jahlive-q7y Thank you!

[@JattaVictor]

I follow you every day you make me understand so many things Boss

[@KITS_Auto_and_Truck_Repair]

@user-dz4jb5rg6k I'm glad to hear that the videos have been helpful!

[@rooster5755]

I work on Fords for almost 30yrs and ill say that ive never had a fuel pump cause lean codes.maybe im lucky but what it is.almost always a vacuum leak or a MAF sensor.very nice video

[@KITS_Auto_and_Truck_Repair]

@rooster5755 Thank you!

[@tonyfremont]

You gotta admit that having such low pressure perfectly explains the fuel trims. Back in the old days (1990 OBD1), we used adjustable fuel pressure regulators to increase fueling during open loop, during closed loop, the ECM would just pull the extra fuel, but not complain unless you were running absurd fuel pressure that it couldn't correct for.

[@TimDyb]

Great diagnosis! I read in other comments about how the brake affects the fuel trims.

[@KITS_Auto_and_Truck_Repair]

@timd1833 Thank you!

[@jimgeorge4677]

First time visiting your channel. You hit some key components that I really like: * You looked at FF data. This helps tremendously. * You suggest OEM. Cannot tell you how many times I (and iatn members) have bashed my head against the wall on a problem due to aftermarket parts. One thing that would be very nice, is to put down a final fix. Yes, your fuel delivery is low, and most likely a fuel pump, but until this repair is completed we do not know for sure. It's like me waving a magic chicken bone at a Cadillac w/ cam codes and say that it is a stretched timing chain. Honestly, I thought for sure it was going to be defective injectors as this ( and MAF sensor) is the main cause of this code off idle.

[@KITS_Auto_and_Truck_Repair]

@jimgeorge4677 This vehile was fixed after the fuel pump assembly was replaced!

[@Juliamalave8989]

First time watching and subscribed, great video and explanation of diagnoses. Fantastic job

[@KITS_Auto_and_Truck_Repair]

@josefachal1608 Thank you and welcome to our youtube community!

[@tomlombardo85]

Just came across your channel and checked out a video. Very informative and clear diagnosis. really liked it and looking forward to watching more !

[@KITS_Auto_and_Truck_Repair]

@tomlombardo85 Thank you and welcome to our youtube community!

[@Okie-Tom]

I did see on the scan tool that if the fuel pressure is low, first check the pressure regulator. So you must have been tapped into the fuel line before the pressure regulator. Very informative video. I am a new subscriber and really like how you teach us as you find the problems! Thanks, Tom

[@KITS_Auto_and_Truck_Repair]

@Okie-Tom My Pleasure, welcome to our youtube community!

[@tuoerming]

he knows what he is doing, that is for sure

[@KITS_Auto_and_Truck_Repair]

@tuoerming Thank you!

[@mohabatkhanmalak1161]

Wonderfull diagnosis, you went straight to the problem. Thanks for sharing.

[@KITS_Auto_and_Truck_Repair]

@mohabatkhanmalak1161 My Pleasure! Thanks

[@sheerwillsurvival2064]

Great video customer seems like a nice guy . Glad you helped him out 👊🏻

[@KITS_Auto_and_Truck_Repair]

@sheerwillsurvival2064 Thank you!

[@lascelleswilson2259]

I wish were close to me in Texas,I've been having a ac problem for over two and half years on my 2017 genesis g90 and quite a few guys on the genesis fourum having the same problem and Genesis have not or can't figure it out ,but they call their guys master tech,u are a lot better than their tec,way better, like I said I wish u was closer

[@KITS_Auto_and_Truck_Repair]

@lascelleswilson2259 Aww! Thank you

[@Joserocha-wm9de]

Great job diagnosing the problem brother, u got a new subscriber I'm also surprised that customer didn't complain about lack of power due to low pressure fuel because besides causing running issues I'm pretty sure that lack of power would be an issue as well Great job brother 👌

[@KITS_Auto_and_Truck_Repair]

@Joserocha-wm9de Thank you! welcome to our youtube community!

[@dreamlandmotors]

This is really outstanding. Weldone Boss

[@KITS_Auto_and_Truck_Repair]

@dreamlandmotors Thank you!

[@olayinkamuyideen8735]

Hello bro, as always I really enjoy this video because I think am going to deal with something like this some because on one of the car am fixing I feel the car is misfiring with no code but short fuel trim is 0 and long term is over 35 and this video gives me point of where to look first, Bro more blessing I pray to God to keep increasing you in knowledge, wisdom and understanding. One love ❤❤❤ Keep the good job going

[@KITS_Auto_and_Truck_Repair]

@olayinkamuyideen8735 My Pleasure Bro! Good luck with the car you're fixing, let me know what you find

[@moebadat3383]

Awesome videos and information brilliant work Deo. All your videos are great such a calm cool person. Keep up the great work.

[@KITS_Auto_and_Truck_Repair]

@moebadat3383 Thank you!

[@moebadat3383]

You're welcome my brother.

[@chukachuka17]

This is wonderful. I'm greatly impressed. Diagnosis made easy. I have a 2008 BMW 535i which I have been battling with lean code bank 2. Funny enough the LTFT is high both on banks 1 and 2. But it only reports code for bank 2. Fuel trim doesn't get better with increasing RPM. Fuel pressure on scan tool is normal at idle. What am I possibly dealing with. I have ruled out vacuum leak with a smoke machine. Your big fan from Nigeria

[@KITS_Auto_and_Truck_Repair]

@chukachuka17 measure a fuel pressure with a pressure gauge and see what happens, if fuel pressure is good, then do the injector flow rate test!

[@debtfreehouse6216]

Excellent troubleshooter

[@KITS_Auto_and_Truck_Repair]

@debtfreehouse6216 Thank you!

[@dakilangmananabas5276]

Yep this man is close to legendary

[@KITS_Auto_and_Truck_Repair]

@dakilangmananabas5276 Thanks!

[@mikelewis6726]

I always enjoy all of your videos keep up the good work man

[@KITS_Auto_and_Truck_Repair]

@mikelewis6726 Thank you!

[@d1bergman]

Very nice job. Very good explanation of what you were doing nd why. I'll be looking for more videos from you.😃

[@KITS_Auto_and_Truck_Repair]

@d1bergman Thank you!

[@terryowusu7930]

Your are doing a pretty good job. Thank you.

[@KITS_Auto_and_Truck_Repair]

@terryowusu7930 My Pleasure! Thanks

[@billsmith2212]

Great lesson . It pays to be thorough in thw beginning . Some places also replace the fuel filter automatically . And the relay . They may tell the customer if the relay goes bad and you are stuck in a month , no warranty on the your old relay . Overkill but careful .

[@KITS_Auto_and_Truck_Repair]

@billsmith2212 Thank you! Replacing the fuel fiilter would be a great idea but the relay you don't have to!

[@notsureigaf]

On these Corollas the fuel filter is part of the pump, there's no external filter to replace.

[@billsmith2212]

I agree . But when dealing with the public it can be interesting . " You fixed a flat tire a month ago and now my radio doesn't work ! " 😂

[@bobbybenn8275]

Thanks for sharing. I'm learning how to read graphs from you. I have a launch and a autel plus my blue driver. Thanks for your awesome expertise. Have a great day.

[@KITS_Auto_and_Truck_Repair]

@bobbybenn8275 My Pleasure!

[@LesterFougere]

I can not tell you enough how much I enjoyed this video. You two working together is priceless. Thank you for this great video. One question I will ask you. When,regarding fuel pressure, when will you require the fuel filter replaced? Lester

[@KITS_Auto_and_Truck_Repair]

@LesterFougere My Pleasure! the fuel filter on this vehicle is part of the fuel assembly

[@ysitrim88]

Thanks!

[@KITS_Auto_and_Truck_Repair]

@ysitrim88 My Pleasure! Thanks for donating to the channel!

[@ysitrim88]

@@KITS_Auto_and_Truck_Repair Np my friend.

[@feitankung]

learn something new today...great video!!

[@KITS_Auto_and_Truck_Repair]

@feitankung Thank you!

[@denisjazmanj8927]

Thank you for sharing your wisdom sebo..im a mecanic in making and i enjoy learning..cheers

[@KITS_Auto_and_Truck_Repair]

@denisjazmanj8927 My Pleasure!!

[@GabrielEbenezer-ko2hp]

Am just like you in trouble shooting faults ❤❤❤ nice one boss

[@KITS_Auto_and_Truck_Repair]

@GabrielEbenezer-ko2hp Thank you!

[@ahmadsalh8522]

you are gut we love you we learn so much from you thank you God bless you.

[@KITS_Auto_and_Truck_Repair]

@ahmadsalh8522 Thank you!

[@michaelmanaois6396]

i need watching your clip i started to buy a used my suv shout out my bro...

[@KITS_Auto_and_Truck_Repair]

@michaelmanaois6396 Thanks!

[@SulemanHabib-p6w]

Kit,s auto we are proud of u, thank you for your help all ways ,number 1,is your friend Habib auto from Ghana

[@KITS_Auto_and_Truck_Repair]

@user-dl2ef8bw9f Thank you my Friend Habib From Ghana!

[@adamissah452]

I'm also from Ghana can we be friends

[@KITS_Auto_and_Truck_Repair]

@@adamissah452 of course my Brother from Ghana we can be Friends! Send me an email Please!

[@riuuku]

Great video in explaining fuel trims I'm still trying to learn that. Can you explain more what's a good reading or bad reading. On oxygen sensors

[@KITS_Auto_and_Truck_Repair]

@riuuku Thanks!

[@NaghmaAli-o7u]

Thanks bro ❤ I appreciate all

[@KITS_Auto_and_Truck_Repair]

@user-bm8ek5jp9x My Pleasure!

[@RobsonChingoma]

Great video ROBSON CHINGOMA from Zambia

[@KITS_Auto_and_Truck_Repair]

@RobsonChingoma Thank you ROBSON

[@JimSampson-y6v]

Good Diagnostic. I find the U.S. version of this Toyota usually has a seperate fuel filter ( in addition to the in tank filter on the pump ). The seperate filter is very poor quality and plugs up easily and may be why the pumps fail. Pretty common here. I replace the filter with a better non-toyota part. Of course new pump also.... Note: this version may not have the seperate filter.

[@KITS_Auto_and_Truck_Repair]

@user-cp5vl9ot9x Thanks, Good suggestion, I agree with you

[@on-site4094]

Great detailed diagnosis 👍

[@KITS_Auto_and_Truck_Repair]

@on-site4094 Thank you!

[@AlexReis-k7m]

Great video ! Im learning mechanics at the Alameda School in Oakland California...Ald guy (51 years old )starting a new career ..Could you explain why step on the brake change fuel trins values and the relationship with 02 sensor ? Im taking computerized engine controls classe and this looks a cool trick brot

[@KITS_Auto_and_Truck_Repair]

@user-lb1zg7wb4f Thank you! when You pump the brake pedal while the engine is idling you create a lean condition on a vehicle that has a vacuum operated brake booster, because in the booster there is vacuum on one side and atmospheric pressure on the other, so pumping the brake pedal allows air to enter the vacuum chamber and create a lean condition, since the vacuum side is attached to the intake manifold, when this happens 02 sensors that are good react to the mixture change very fast, indicating good 02 sensors!!

[@mikembz1]

Sir love your diagnosis approach if fuel pump had low voltage can that produce low fuel pressure why do you condemn faulty fuel pump without checking proper voltage and ground at the fuel pump connector and amperage of the fuel pump.

[@KITS_Auto_and_Truck_Repair]

@mikembz1 Good question and that would be a good test to do

[@matthewnyack6745]

Very good the best

[@matthewnyack6745]

❤❤🎉🎉

[@KITS_Auto_and_Truck_Repair]

@matthewnyack6745 Thank you!

[@OLUKAANTHONYMOSES]

I have liked your work and the way you have diagnosed the it

[@KITS_Auto_and_Truck_Repair]

@OLUKAANTHONYMOSES Thanks!

[@CharlesCharles575]

l really enjoy your videos.. thank you my engineer

[@KITS_Auto_and_Truck_Repair]

@CharlesCharles575 My Pleasure!

[@mohammadal-gebaly3046]

As usual my friend , highly appreciated , professional , fantastic explanation of the problems , respected man and very kind , thanks Deo , is it a correct name , greetings from Egypt .

[@KITS_Auto_and_Truck_Repair]

@mohammadal-gebaly3046 Thank you my Friend from Egypt! Yes Deo is my name!

[@mariomata9177]

Excellent job. Thanks for sharing your knowledge 😊

[@KITS_Auto_and_Truck_Repair]

@mariomata9177 My Pleasure! Thanks

[@Catayst-123]

Wow! OUTSTANDING Video! I'm New to Your Channel. Thank You for Your Professionism. Take Care and Godspeed!

[@KITS_Auto_and_Truck_Repair]

@Catayst-123 Thank you and welcome to our youtube community!

[@turbo8711]

Deo, you are a great diagnostician. This industry doesn’t have many like you around here. Where are you located? Another great video!!!

[@KITS_Auto_and_Truck_Repair]

@turbo8711 Thank you! I'm located in Dickerson MD

[@nickhyslop5743]

Was that MAF sensor also under reporting? Looks like it was under 2 GM/S at idle shouldn’t it be about 3.1 GM/S at idle?

[@KITS_Auto_and_Truck_Repair]

@nickhyslop5743 No MAF Sensor was fine!

[@JattaVictor]

God bless you and your family and friends

[@KITS_Auto_and_Truck_Repair]

@user-dz4jb5rg6k Thank you!

[@jamessmart2937]

Love your videos thanks for such great content

[@KITS_Auto_and_Truck_Repair]

@jamessmart2937 Thank you!

[@hermanrogers1325]

I had problems like this with my 04 mustang GT and I had to go to different mechanics one said that the engine was going bad and needed replacing so I told the 3rd mechanic to just replace the fuel pump and he did now the car good but I have evap codes I wish I could bring my car to you

[@KITS_Auto_and_Truck_Repair]

@hermanrogers1325 Oh that's too bad! do you live close to Maryland?

[@Dicofol1]

Good video well explained. Now I know how to diagnose the Corolla fuel system issues. Is it common to have a fuel pump failure on this Corolla version?

[@KITS_Auto_and_Truck_Repair]

@Dicofol1 Thank you!

[@JoelAutomotiveInaction]

Nice diagnostic process , with logical approaches, I would like to see a fuel flow test (volume) during engine running openinig the fuel pressure gauge clear hose . My friend did you know the ase patches on your shirt are on the wrong side? I say it because they are intended to show this while road testing a vehicle for example . Great job on the diag

[@KITS_Auto_and_Truck_Repair]

@JoelAutomotiveInaction Oh Really? I didn't know that, Thanks

[@cbarkwell1000]

Fuel Volume Testing is Great , however ; absolutely unnecessary . With Long Term Fuel Trims pegged @ 35 % - the Vehicles Computer is telling me that it had to Add 35 % of Fuel to bring the Vehicle back to 14.7 % Air & 1 % Fuel - I woulda connected a Fuel Pressure Gauge within 5 minutes after the Book told me the Fuel Pressure Specs. for this Vehicle or ANY vehicle. Former Auto Smog Tech - Southern California ( ASE Certified then ) My Man with the Patches on the Port & Starboard Sides is Extremely Good. Vietnam Era Veteran

[@JoelAutomotiveInaction]

Having + 35% means there is not the proper amount of fuel in the combustión chamber when he increases the rpm to 3,500 and I see those numbers I would have gone for maf sensoe not fuel , since from 600 RPM to 3,000 rpm you never change the Inyección pulse at all with no loads how the fuel pressure can afecct when you did not demand for Inyección pulse ?0​@cbarkwell1000

[@ysitrim88]

Awesome diagnostic video my friend! And i knew you meant air filter and not fuel filter 😅

[@KITS_Auto_and_Truck_Repair]

@ysitrim88 Lol!! Thanks my Friend!

[@ysitrim88]

@@KITS_Auto_and_Truck_Repair Your welcome

[@rrotwang]

Brooklyn in the house

[@KITS_Auto_and_Truck_Repair]

@rrotwang Lol!!

[@user-em5mi3zo3c]

Very good diagnostic blessings brother

[@KITS_Auto_and_Truck_Repair]

@user-em5mi3zo3c Thank you!

[@mehmetkunt2503]

Good diagnostic

[@KITS_Auto_and_Truck_Repair]

@mehmetkunt2503 Thank you!

[@adamissah452]

Good job bro I'm learning from you keep it bro God bless you

[@KITS_Auto_and_Truck_Repair]

@adamissah452 Thank you!

[@blessevans6808]

Waoo keep it I have learnt alot Iam also a mechanic

[@KITS_Auto_and_Truck_Repair]

@blessevans6808 Thank you my friend!

[@neverstoplearning382]

Deo is the man.

[@KITS_Auto_and_Truck_Repair]

@neverstoplearning382 Thank you!

[@agoodneighborautorepair2176]

Very good information and explanation..

[@KITS_Auto_and_Truck_Repair]

@agoodneighborautorepair2176 Thank you!

[@jack00499]

For the low fuel pressure, why was it affecting bank 1 (P0171) vs. bank 2? I'm not familiar with these cars, but I'm guessing that there may be additional pressure loss going from the bank 2 to bank 1 side, again assuming that the fuel line is closer to bank 2? Just a wild guess, but why else was bank 1 looking worse? I actually bought a used 2007 Land Rover LR3, and it has the P0171 code. The mechanic where I bought it said he replaced the MAF sensor, EGR, 4x O2 sensors, and checked connections, etc. with no luck. The check engine light stays off for up to two days after I clear it (repeats) with my iphone carscanner app. I need to go for a smog check tomorrow, so I shall see if I pass with slightly higher fuel trim numbers for bank 1 (compared to bank 2) when I open the throttle @ 3300rpm (bank one STF 7%, LTF 5.5%, 12.5% Total, bank two STF 3.1%, LTF 7%, 10.1% Total). As the mech said, everything else is looking good, so I need to further test to find the culprit. Just for additional info, at 700RPM: bank 1 STF= -2.3% & LTF= 1.6%, bank 2 STF= -2.3% & LTF= 3.1%. The car is driving OK, but I'm guessing it should have more power for a 4.4V8. I'm not seeing the fuel pressure reading in my scanner like I did with my 2018 Chevy Tahoe, but this feels like a small vacuum leak somewhere if you would agree. Thanks, and I apprieciate the help!

[@KITS_Auto_and_Truck_Repair]

@jack00499 My Pleasure!

[@jamesgichuhi2174]

James from Kenya also a fellow mechanic in Kenya likes the video pretty much 👍👍

[@KITS_Auto_and_Truck_Repair]

@jamesgichuhi2174 Thank you james from Kenya!

[@jannatmangul9821]

Deo ur really good man

[@KITS_Auto_and_Truck_Repair]

@jannatmangul9821 Thank you!

[@ssentaayiakram2476]

Thank you very much sir for teaching us

[@KITS_Auto_and_Truck_Repair]

@ssentaayiakram2476 My PLeasure!

[@michaelmanaois6396]

i saw changing the fuel sensors floating fuel at the back seat...

[@KITS_Auto_and_Truck_Repair]

@michaelmanaois6396 Oh really!!

[@haroldlarios5507]

Thanks for sharing your knowledge, God bless you

[@KITS_Auto_and_Truck_Repair]

@haroldlarios5507 My Pleasure! Thanks

[@armourarmour1038]

Wow..Amazing bro. My super hero...what brand of fuel pressure guage is that?

[@KITS_Auto_and_Truck_Repair]

@armourarmour1038 Thanks! I got this gauge from Harbor freight

[@pauloleuta6203]

Hi sir , my name is Paulo. I'm from Nevada Las Vegas.

[@KITS_Auto_and_Truck_Repair]

@pauloleuta6203 Hello Paulo!

[@andymasiddo8180]

You’re the BEST!!!

[@KITS_Auto_and_Truck_Repair]

@andymasiddo8180 Thank you!

[@Swenser]

Can pressure differences also be due to problems closer to engine Like injectors?

[@KITS_Auto_and_Truck_Repair]

@Swenser No. not at all

[@quanla9569]

Thanks man I learned a lot

[@KITS_Auto_and_Truck_Repair]

@quanla9569 My Pleasure!

[@bartscave]

Thanks for sharing Deo. Good video.

[@KITS_Auto_and_Truck_Repair]

@bartscave My Pleasure! Thanks

[@stevejami8074]

❤❤❤ you are the best bro

[@KITS_Auto_and_Truck_Repair]

@stevejami8074 Thank you!

[@drdeth1966]

A faulty fuel pressure relief valve check test before replacing fuel pump?

[@KITS_Auto_and_Truck_Repair]

@drdeth1966 good point, but the issue here was a bad pump

[@alihydertaj345]

Greatone👍🏼👍🏼 from india.. Thank you for the sweet video.. 😇..

[@KITS_Auto_and_Truck_Repair]

@alihydertaj345 My Pleasure! Thanks

[@renemata4350]

Hi mi friend exellent diagnóstico thanks for sharing your knowledge blessinngs 👍👍👍👍👍👍👍👍

[@KITS_Auto_and_Truck_Repair]

@renemata4350 Hello my Friend, Thank you!

[@spirokattan3655]

Good case study! I noticed MAF only reporting 14.25 gm/s @ 4,185 rpm (12.59). Could the MAF also be underreporting? Thank you for posting!

[@KITS_Auto_and_Truck_Repair]

@spirokattan3655 My Pleasure! That MAF Sensor was updatingg pretty slowly, this car was fixed after the fuel pump assembly was replaced!

[@spirokattan3655]

Cool! Thank you

[@spirokattan3655]

PS: I checked my own car which is a 1.8 liter and sure enough the MAF values were the same as your car (in park).

[@Z14kt12timandjes1]

Nice work! Thanks for sharing

[@KITS_Auto_and_Truck_Repair]

@Z14kt12timandjes1 My Pleasure! Thanks

[@remio0912]

What fittings are you using to connect the fuel pressure gauge to the vehicle? I have a DIY fitting and it leaks.

[@KITS_Auto_and_Truck_Repair]

@remio0912 I got fittings from AESWAVE.COM

[@remio0912]

@ thank you for the information.

[@CarlosGuerrero-pf2iy]

Good work bro 🎉

[@KITS_Auto_and_Truck_Repair]

@CarlosGuerrero-pf2iy Thank you!