In this video i am diagnosing fuel trim numbers along with a dirty MAF Sensor. During the process we will find out that the dirty Maf sensor was not the only problem on this vehicle.
Пікірлер: 298
@mammutit5 жыл бұрын
clearing DTC does not reset the fuel trim numbers, the reason you got worse numbers after cleaning is because the maf sensor was wet and cold, it takes a little time for it to warm up and dry, you could actually see that when you raised the rpms after the cleaning you started to get negative fuel trim numbers which means it was getting better and if you just would have taken the car out for a 10 minute drive the negative short term would lower the long term fuel trim
@PSALM-144-13 жыл бұрын
Just bought a 2003 Lexus ES 300. Was having trouble with too rich lean codes. I would step on the gas and around 2500 rpm it would max out at 52.3% Long Term FT on both Bank 1 & 2. Luckily I had my own scan tool and figured those specs would be the same for the Lexus since it was an 03. I had “cleaned” the MAF and the throttle body prior to watching your video. I noticed on the MAF sensor you showed those heater coils. I didn’t clean those. Sure enough the top one was dirty and when I disconnected the negative battery to reset the codes I was running dead on the spec sheet you showed. I couldn’t be happier. I was thinking it was my Bank 2 Sensor 1 A/F Sensor, since it kept showing p02198 as well as p0171. Thank you!!!
@gsmecanica5 жыл бұрын
Great diagnosis and video content is very good as well. Having 2 banks helps diagnosis a lot, you know already that it is not the fuel pump since one bank is working good. Well done and thanks for posting mate!
@everardocamacho50636 жыл бұрын
Great video Eli, I'm learning fuel trims problems, these videos are very helpful to me, and I appreciate you make them, thank Eli, hope one day we meet personally, cheers from ontario ca,
@waynehutchinson14233 жыл бұрын
Best explanation yet that have found for MAF.Thank you
@jeffreynobles9485 жыл бұрын
Yep, it's within spec of the +/- for 10 %. If it's a high mileage vehicle, I would definitely be OK with those numbers. In my experience of being a mechanic for years, it's hard to get them to null out to zero, unless it's a newer vehicle. My 2001 S-10 4.3L with 170,000 miles hovers between +6 to -2 total trim on both banks. My fuel pressure is fine also as I put my gauge on it to test it( after I put a new pump in it a while back, and fuel filter, along with new intake manifold gaskets upper and lower). Mechanical wear in the engine plays a part in this, as the tight tolerances open up over time and cause higher than optimal LTFTs. My rule of thumb that I use on all the vehicles I work on, is that if the total fuel trims are between +/ 10%, I leave it alone.
@EliTheOBDTech5 жыл бұрын
Good valid points!!
@duanedonaldson22623 жыл бұрын
Amigo, there is a difference in NORMAL and IN RANGE, normal is floating around zero to + - 5, in the range is as high as 20 while the STFT is still active if the LTFT and STFT both max out then this is out of range and other codes will be set. Any LTFT is compensating for a problem with STFT but the computer can handle it. A partially clogged exhaust can also cause these same types of readings. MAF g/s should typically be 1.1 g/liter (or a little higher) of the engine so 3 liter is about 3.3 g/s. A larger item collects more dirt. I think one is the MAF and the other is a temp sensor. Don't clear codes, LTFT takes time to normalize, you need to do a test drive. FOR EXAMPLE, if you or a tech does not fix a problem, the next tech wants all the info he can get so pls don't just erase it, pass it on. In this case, you are correct to look for an additional problem. Thank you for showing before and after cleaning the MAF but it does not seem to help enough. As we can see, after loading the engine the LTFT went back up, this is why you should not erase codes, the MAF was fixed, the computer would learn the new strategy on its own. Now there is no MODE 6 data for the next guy if needed and all Monitors have been erased and some take days to re-run so if you live in a SMOG State, your customer is screwed for Emission Testing quickly. The vacuum leak only needs a small increase in RPM and it's mostly noticeable in STFT, I don't see that here near the end of the video. You are still lean on bank 2, I think you need to clean the injectors and I would need to see O2 sensor activity to give a better answer about valve adjustment or other minor problems. It's not MAF (affects both sides) and it's not vacuum on one bank, not at that RPM. How many cats as the actual code is for a cat, are there two or does bank 1 and bank 2 joint to a single exhaust. P0420, need to watch pre O2s and post O2s for a better picture. Thank you very much for this Case Study, very good at showing before and after diagnosis. It is 2021 now and I am very sure you have a lot more experience. I will go look for PART 2 if you have one. Mucho Gracias.
@EliTheOBDTech3 жыл бұрын
Thanks for your good analysis my friends.
@alfredalvidrez62877 жыл бұрын
I liked the way you when over the long term fuel trim.
@stevenmchenry92766 жыл бұрын
You're the greatest. Keep the videos coming.
@EliTheOBDTech6 жыл бұрын
Steven McHenry Thanks. I should resume soon with videos.
@eddieorozco5806 жыл бұрын
Great video ! Thanks for the info, I didn't know that you have to disconnect the battery to reset the computer, I thought by only clearing the codes will be enough, I had different results by disconnecting the battery, THANKS again.
@EliTheOBDTech6 жыл бұрын
In some instances like Toyota/Lexus you have too in order to clear fuel trim memory. Second option would be driving your vehicle 50+ miles in order to relearn new fuel trim parameters.
@ulisesquintero121910 ай бұрын
@@EliTheOBDTech hi i have toyota tacoma 2008 how i can reset the long term fuel ?
@EliTheOBDTech10 ай бұрын
@@ulisesquintero1219 HI Ulises, from my understanding, a capable scanner will do the trick, by doing a reset memory in the special function option.
@EliTheOBDTech10 ай бұрын
I'm not 100% sure if disconnecting the battery for at least 20 mins will do trick.
@MC-hs4mf6 жыл бұрын
Can u give me the specs or tolerances for my vehicle for live data? Maf is 0.04 engine off and 0 91 lb/min at idle. New filter tries cleaning maf without brush
@dfields95114 жыл бұрын
Great explanation
@sf77605 жыл бұрын
on Same throttle position, dirty MAF Sensor will notice lower Air mass, compared to Cleaned Sensor. More air means need more fuel. Thats the logic to get proper AFR.
@reckless909jv6 жыл бұрын
I have a 2015 Tacoma 4.0 code of p2438 it's has a limp mode where should I get started
@jimstelljes39256 жыл бұрын
Nice video Eli TheOBDTech. I have a 2002 Toyota Camry XLE V6 3.0 Liter 1MZ-FE engine. The engine stalls at idle on occasion when I stop at a traffic light. It will stay that way until I get to my destination ant turn it off for a while. Then it works fine when I drive it again. It can go a few days or a few months before it happens again. I have cleaned the MAF sensor a few times with the CRC Mass Air Flow Sensor cleaner but have not used a brush as you recommended. I have also cleaned the throttle body. There is no check engine light or any codes with the scanner. Can I use the same data sheet from this video, as it appears to be the same engine. Any thoughts on this issue?
@EliTheOBDTech6 жыл бұрын
Jim Stelljes sorry for the delay. I'm pretty sure you can use same spec sheet.
@EliTheOBDTech6 жыл бұрын
Jim Stelljes I'm thinking that you may have a fuel delivery problem or an idle air control valve issue.
@jimstelljes39256 жыл бұрын
Thanks.
@WV5912 жыл бұрын
Should have replaced the MAF. Much less expensive and time-consuming instead of other rabbit holes.
@ignacioromero50145 жыл бұрын
good video the only thing I would do different is when using the phrase "fuel trim" always specify "Long term" or "short term" because they have different functions.
@EliTheOBDTech5 жыл бұрын
For sure
@CHIBA280CRV9 жыл бұрын
Cool , but could it be a vacuum leak that,is,making the numbers go rich ? Did you get to make a another video on it? That is strange no code . Thank you bro.
@EliTheOBDTech9 жыл бұрын
***** I do suspect a vacuum leak only because the fuel trim numbers are positive and tend to drop when applying a higher rpm. At the same time i also think the vehicle may have restricted injectors due the fact the fuel trims would fluctuate during certain rpm range. No, I have done another video. Customer will bring it back when the vehicle throws a code.
@abuaglamadha57842 жыл бұрын
. You have a piece of paper on which the real values of the sensors are written. How do I get the values for other vehicles
@EliTheOBDTech2 жыл бұрын
FYI.... not all manufacturers provide parameter data values. In this case, Toyota does. This was obtain from a automotive service repair program called AllData.
@dominicamassive7 жыл бұрын
Just want to say great vid. I was wondering , where did you find the sheet that you have with all the specs?
@EliTheOBDTech7 жыл бұрын
Otis George Through All Data program. What vehicle do you have?
@donnarobinson6996 жыл бұрын
Can you send one to me. 2002 dodge Caravan Sport 3.3L v6 Gas
@EliTheOBDTech6 жыл бұрын
What's your email?
@EliTheOBDTech6 жыл бұрын
Hey Donna, unfortunately AllData does not provide a Spec Sheet for your vehicle. Sorry.
@abdulbeany189411 ай бұрын
Hi do you have a spec sheet for audi a4 b7 2.0 tdi bre engine thanks
@armang105 жыл бұрын
Hi Eli! Great video! Very informative. I was wondering if you have spec sheet for Subaru Outback 2.5 2005. I also have increased ltfts. Thanks.
@EliTheOBDTech5 жыл бұрын
Not all manufacturers provide that information, but if they do, what's your email?
@armang105 жыл бұрын
@@EliTheOBDTech sedautov@gmail.com
@EliTheOBDTech5 жыл бұрын
@@armang10 Alldata only provides ecm pinout values, still very useful. Is your vehicle a U5/Low emission vehicle or non-U5?
@armang105 жыл бұрын
@@EliTheOBDTech Hi Eli! I have no idea if it is u5 or non u5. It is made in the USA. How do I check it? Thanks!
@EliTheOBDTech5 жыл бұрын
@@armang10 Perhaps in the emissions label under hood or in the valve cover. I'll just send u both.
@InfinitelyManic7 жыл бұрын
Seems that LT fuel trims under load < +- 10% are normal. Don't see any need for further diagnostics with those parameters.
@EliTheOBDTech7 жыл бұрын
David Usually a vacuum leak will tend to drop long term and short term fuel trims under load to normal values. If that happens that is usually an indication of a vacuum leak.
@EliTheOBDTech7 жыл бұрын
Although I did not record the fix for this vehicle, the culprit problem was a cracked intake hose and couple of cracked vacuum hooses that connect to the intake manifold
@haooto12606 жыл бұрын
Thank you very much
@meganmartin30634 жыл бұрын
Amazing Video. Could you send me the data sheet on my 2014 Ford Mustang 3.7 Engine V6? I am having sputtering, loss of power with no codes and weird fuel trim data. Thanks :)
@EliTheOBDTech4 жыл бұрын
Hopefully, sometime today. Can you send me your email?
@dm70975 жыл бұрын
Would an issue with o2 sensors cause the same numbers?
@EliTheOBDTech5 жыл бұрын
Usually an O2 sensor will either have a steady rich or lean condition.
@dm70975 жыл бұрын
@@EliTheOBDTech awesome! Thank you very much for the reply. I am trying to learn as much as I can about this stuff. I appreciate you sharing your knowledge.
@teravolt61135 жыл бұрын
@@dm7097 Then you can learn something more: never spray anything at all on O2 sensor connectors. They work with reference air and they pull it from the sensor wires. Spray anything (such as MAF sensor cleaner) on them, and the ECU begins reading always lean (very low voltage) until you replace the entire sensor (expensive stuff). Don't make the same mistake i did (well, O2 sensor was due for replacement anyway in my case since it was very very old and was also replaced with an updated part).
@dm70975 жыл бұрын
@@teravolt6113 ok thank you, never really thought about that before. Awesome.
@OSCARANDRES039 Жыл бұрын
Where did u get the spect print out?? I'm having a similar issue on my is250. But I think I solved my issue this morning. It seems that my new toyota MAF does not fit snugly in the air intake tube, those creating a small vacuum leak. I switch back to my old sensor and BAAM! My fuel trims went down from 20% and 30% respectably. To about -3% and 6%.
@EliTheOBDTech Жыл бұрын
This spec sheet was from AllData.
@EliTheOBDTech Жыл бұрын
What was reason for replacing it the first time?
@OSCARANDRES039 Жыл бұрын
@@EliTheOBDTech I had recently bought the car and wanted to start out fresh knowing that I had done a much needed maintenance on it. I replaced all 4 rotors and brakes. All fluids, Wipers, spark plugs, plug wires, vvt oil sensors, air cleaner, MAF, EGR valve, O2 sensors,. I've also did a complete air intake cleaning all the way down to the valves removing as much carbon from the top of the valves. I also added a oil catch can. Soon there after I started getting the check engine light on and being that I was not getting a Code for bad MAF but rather a rich condition bank one, I figure it had something to do with fuel regulator or a vacuum leak. But not a bad MAF. Ur videos help me a lot understanding the long term and short term trims. I never would have suspected that it was the actual MAF housing that was causing the vacuum leak. Thanks again !!!🤗🤗👍👍
@EliTheOBDTech Жыл бұрын
@@OSCARANDRES039 I'm glad to see that this video helped you understand fuel trims. Cheers my friend.
@Informed1043 жыл бұрын
Hi Eli - thanks for the great video! I have access to Alldata,, but can't seem to find the data sheet that you use in the video. What area should I be looking in? Thanks!!!
@EliTheOBDTech3 жыл бұрын
What kind of vehicle are you looking for? Not all manufacturers give out that information.
@EliTheOBDTech3 жыл бұрын
I would need to look at the program to give you a good answer.
@Informed1043 жыл бұрын
Hi Eli - Thanks for the quick reply! I finally found it! You had given another poster a ballpark location, and I just poked around until I finally found it! This is such useful information. BTW, the vehicles is: 1999 Mercury Sable Wagon / 3.0L Duratec DOHC 24-valve - automatic. I have a free ALLDATA account through my library. Usually you have to go into the library to use it. Anyway, the path through ALLDATA is as follows: After login - choose the REPAIR (blue box) [Under SYSTEM and COMPONENT banner] POWERTRAIN MANAGEMENT [Under COMPONENT banner] COMPUTER and CONTROL SYSTEMS [Under TESTING and INSPECTION Heading - Right side] SCAN TOOL TESTING and PROCEDURES Normal Scan Data Values - Includes PIDS - takes you to the values
@EliTheOBDTech3 жыл бұрын
@@Informed104 I'm glad you found your way around this data sheet.
@sprocket4542 жыл бұрын
I'm lost on my 2003 ES300. It has sky high LTFTs at idle suggesting a vacuum leak. I just changed the spark plugs. I know for a fact it wasn't like that before the plug change. I changed the intake gasket. I checked every vacuum hose. I went around all the hoses and the intake with propane. No change in RPM and the RPM is in range. I did the same with starting fluid. No change. As I raise RPM the LTFTs drop. At idle they are close to 30%. I don't get it.
@EliTheOBDTech2 жыл бұрын
Check for brake booster vacuum leak. Best method to eliminate vacuum leaks, use smoke machine. Check your upstream O2 sensor data on a scan tool. Check to see if it's fluctuating from rich to lean.
@mikewilkerson2975 жыл бұрын
Hi Eli I was wondering if you would be able to get a spec sheet for a 2010 camaro 3.6l
@EliTheOBDTech5 жыл бұрын
What's your email?
@KTAGLKS6 жыл бұрын
Hello sir I am from sri Lanka. Your video is good but I wanna know if we change new air flow that rate is coming normal?
@EliTheOBDTech6 жыл бұрын
dunilka rathnayake I'm sorry, but I'm not really understanding your question?
@tamisonsresources33965 жыл бұрын
I think what he's saying is if the Mass Air flow sensor was replaced, would this problem be resolved?
@aliakas14022 жыл бұрын
scannerdanner says that high negative ltft at idle and high positive ltft at high rpm this is dirty maf sensor.
@EliTheOBDTech2 жыл бұрын
Yes, that is correct.
@pablomarquez44313 жыл бұрын
So I got code p0171 but my lg term trims are stuck at 14.1 and 13.3% it doesn't not change no matter if I rev it to 3krpm. I help it for a min and the lg term on both banks stayed the same. Could if still be a bad maf?
@EliTheOBDTech3 жыл бұрын
I would say, it's a combination of a dirty/faulty MAF sensor, dirty injectors and even some type of vacuum leak.
@maxsmith23205 жыл бұрын
very nice tutorial. do you have specs for 2006 DODGE CHARGER SXT V6 3.5L thank you
@EliTheOBDTech5 жыл бұрын
I will check sometime this weekend. If the program provides that info for your vehicle, I will email it on Monday. What's your email?
@armang105 жыл бұрын
@@EliTheOBDTech Hi Eli! Great video! Thanks! Do you have the specs for Subaru Outback 2.5 2005? I would appreciate if you can share. My email is sedautov@gmail.com
@jerrypeal6534 жыл бұрын
Likely going to be about 3.5 gm/s
@ILoveCycNails5 жыл бұрын
hello. SHRTFT1(%) = +6.3 and LONGFT1(%) = -7.0 , is good or bad? Another question: SHRTFTB1S1(%) = 2.3 and SHRTFTB1S2(%) = -100.0, is good or bad? what does "G"?
@EliTheOBDTech5 жыл бұрын
What kind of vehicle do you drive?
@ILoveCycNails5 жыл бұрын
@@EliTheOBDTech dacia logan 1.4 2005
@Elniniss5 жыл бұрын
Hello. How can I get a spec sheet for my vehicle? I have noticed gas mileage getting bad and I have no check engine but my long term fuel trim is kind of high.
@EliTheOBDTech5 жыл бұрын
Send me your email and year make and model of your vehicle
@Elniniss5 жыл бұрын
Eli TheOBDTech 2007 Scion tC eliasbarajas@yahoo.com
@EliTheOBDTech3 жыл бұрын
@@Elniniss Sorry bro, for this late response, you still need your spec sheet?
@geoff31728 жыл бұрын
Think the relearn of fuel trims only happens in closed loop
@alexandrudavid4 жыл бұрын
Hi sir can you help me with diagram sheet for lexus is250 2006? I have similar problem with my sensors. Great job! 🎩
@EliTheOBDTech4 жыл бұрын
I need an email
@alexandrudavid4 жыл бұрын
@@EliTheOBDTech hi sir yahoo.com this is my email and Thank you so much for your help
@EliTheOBDTech4 жыл бұрын
@@alexandrudavid hope you can be patient, I should have your data sheet by Wednesday. I'm going out of town.
@alexandrudavid4 жыл бұрын
@@EliTheOBDTech it's ok don't worry. 👍
@alexandrudavid4 жыл бұрын
Hi Eli Please let me know when you send me. Thank you ✌️
@santa2555 жыл бұрын
Is this sheet useful for all kind of cars or it is specific one I mean this readings are general
@EliTheOBDTech5 жыл бұрын
These are mainly for Toyota, Lexus, Scion vehicles. General specs for fuel trims are +/- 10%.
@santa2555 жыл бұрын
@@EliTheOBDTech Could you send it for me if u plz Peak5838@gmail.com Thanx in advance
@edgarvasquez5735 жыл бұрын
Send one too bigpimptoyota@gmail.com
@OSCARANDRES039 Жыл бұрын
Could it be your fuel pressure sensor?
@EliTheOBDTech Жыл бұрын
Yes, it can give the pcm a false reading, which will make the pcm add more fuel.
@juan64bits_8 жыл бұрын
Hello, excellent video! A little question, may be you can help me, what means this values?: At idle (LTFT +10% , STFT -4 ) At 2000 rpm (LTFT 0%, STFT 7%) At 3000 rpm (LTFT +4, STFT +4) My mileage is very bad!!
@EliTheOBDTech8 жыл бұрын
you may have a potential dirty MAF sensor
@juan64bits_8 жыл бұрын
+Eli TheOBDTech thanks for your answer. but my fuel trims improve whith the engine speed. this confuse me.
@EliTheOBDTech8 жыл бұрын
Yes, but at 3000 rpm, your ltft increased to 4%. When fuel trims tend to fluate, it is more likely a MAF sensor being dirty or fuel delivery problem. I wouldn't rule out a potential vacuum leak or a lazy upstream o2 sensor.
@andrewcjeffrey7 жыл бұрын
Do a vacuum leak check (propane or smoke machine)
@andrewcjeffrey7 жыл бұрын
Eli how do you check fuel delivery problems?
@garymiller20566 жыл бұрын
Check pressure and voluume, Andrew
@arthurfricchione81197 жыл бұрын
Eli if possible can you tell me where you obtained the spec sheet. Would like to acquire one for Honda. Thank you very much very helpful videos
@EliTheOBDTech7 жыл бұрын
Arthur Fricchione I got it from All Data. Tell me your year, make and model. I should be able to get you one. give me your email.
@arthurfricchione81197 жыл бұрын
Eli TheOBDTech thanks I have a 1999 Honda Accord EXL 3.0 V6 and a 2007 Honda Odyessey 3.5. Really appreciate your quick response. My Email is ajfricchione@optonline.net. Thanks again really enjoy your videos
@Gtblender7 жыл бұрын
Hey I have a nissan murano 2006 v6 can you get one for me?
@EliTheOBDTech7 жыл бұрын
steven gangaram yes I can. What's your email?
@Gtblender7 жыл бұрын
Eli TheOBDTech gtblender863@aol.com , thank you! My car is revving up and down on idle and also when driving in a repetitive way and I need to find out what part is bad, iac is cleaned, i don't know what it is and cant really afford a mechanic right now..
@luisgonzalez84234 жыл бұрын
Hey in all data do I just search value sheet to find that printout
@EliTheOBDTech4 жыл бұрын
I'm not sure if you can find it under the search field. I can't recall the correct name... it's probably computer/power train management
@keepitcool51623 жыл бұрын
Where do you get that chart? I need one for a 2012 civic si
@EliTheOBDTech3 жыл бұрын
I get them from either AllData or Mitchell. Unfortunately, Honda/Acura does not provide that information on AllData or Mitchell.
@frankensteinrules65113 жыл бұрын
SO, WHAT WAS THE FINAL DIAGNOSES?????????????????????????????????
@EliTheOBDTech3 жыл бұрын
Vehicle had contaminated dirty maf sensor with vacuum leaks. Cleaned maf sensor and replaced few vacuum hoses along with cracked intake hoses going to the throttle body.
@JJ-rd2ef3 жыл бұрын
Can you get the data for a 2005 lexus es330?
@EliTheOBDTech3 жыл бұрын
When I get a chance, I will. Can you send me your email
@EliTheOBDTech3 жыл бұрын
@@JJ-rd2ef Expected sometime this weekend.
@jclim94525 жыл бұрын
Hi mr Eli... could you please send me specs for 2001 celica 1.8, i love watching all your videos.
@EliTheOBDTech5 жыл бұрын
Hi Johnny, you will have to forgive for not sending the spec sheet today. I'm off with my family on this long weekend. Sorry for the delay, expected by Monday. Happy Thanksgiving.
@angelf98003 жыл бұрын
What range should the mass be on a 2008 trailblazer 4.2
@angelf98003 жыл бұрын
Fdz0007@yahoo.com
@EliTheOBDTech3 жыл бұрын
@@angelf9800 It should be between 3-6 g/s and BARO should be 60-104 kPa (varies with altitude)
@EliTheOBDTech3 жыл бұрын
@@angelf9800 My printer is out of service for the moment, so I can't print and scan via PDF to send the spec sheet to you. Sorry.
@isrealperez90694 жыл бұрын
How do I get that paper you have for my 04 BMW 325xi 2.5l sedan awd I have not change my maf sensor I've tried cleaning it but don't change and I have p0420 also can that cause rich condition
@EliTheOBDTech4 жыл бұрын
Not all manufacturers give out data values on AllData or Mitchell OnDemand.
@EliTheOBDTech4 жыл бұрын
I'll check to see if BMW has one for your vehicle.
@isrealperez90694 жыл бұрын
@@EliTheOBDTech thank you cause I can't find anyone to tell me what I looking for God bless you
@EliTheOBDTech4 жыл бұрын
@@isrealperez9069 Sorry buddy, unfortunately BMW does not provide Data sheet values on AllData or Mitchell OnDemand.
@EliTheOBDTech4 жыл бұрын
How's you're fuel trims looking like at idle and 2500 rpms?
@Charkatak4 жыл бұрын
Where did you get a printout of normal readings?
@EliTheOBDTech4 жыл бұрын
AllData
@Charkatak4 жыл бұрын
@@EliTheOBDTech Thanks! I went to www.alldata.com/ and it seems to be subscription based and would benefit shops. I also went to alldatadiy.com/, but it doesn't have my 2016 MINI in the list.
@EliTheOBDTech4 жыл бұрын
@@Charkatak FYI, actually not all Manufacturers provide normal data values, usually most Asian and Domestic manufacturers do, it's vary rare in European vehicles.
@Charkatak4 жыл бұрын
@@EliTheOBDTech Understood! Just wanted to see the normal readings for my vehicle to diagnose MAF sensor failing idea. I couldn't find Bosch MAF sensor datasheet for my 2016 MINI Cooper S 4 dr Hardtop model.
@ramdodgetruck11777 жыл бұрын
How come no one checks the air filter? that dirt on the MAF is coming from somewhere and a dirty filter would cause a low reading at the MAF wouldn't it?
@teravolt61135 жыл бұрын
Unfortunately the air filter can filter up to a certain particle size and no better. So anything smaller than what the filter can stop from flowing to the MAF, flows through and cakes the MAF in dirt over time. That's why it should be pulled out and cleaned up with quick drying contact cleaner every air filter change... but most people just don't give a fuck. Yes, dirty MAF sensing element brings MAF reading down and LTFT up.
@Tootoojackson5 жыл бұрын
My Long trim b1 and b2 is stuck on 100% short trim is stuck on 70% with lack of power can't pass 2,500 RPM with p0300 code now what do you think I clean the MAF sensor the car shakes when I unplug MAF sensor car runs good
@EliTheOBDTech5 жыл бұрын
There is chance that your MAF sensor could be the problem, but I'm thinking that you may have a large vacuum leak. Does your fuel trims drop if you raise the rpms?
@Tootoojackson5 жыл бұрын
The MAF sensor was the problem for the randomly misfire p0300 but when I raised the RPMs it just stay stuck at 100% it doesn't drop at all
@EliTheOBDTech5 жыл бұрын
@@Tootoojackson I'm glad you fixed your problem. That is the usual symptom of a Faulty MAF sensor, it will prevent you from going over 2500 rpms. Very common on Nissan vehicles.
@Tootoojackson5 жыл бұрын
@@EliTheOBDTech thanks for your help also I have one more question if you can help me with my ho2s2 mntr b1 and b2 is running lean what you think that should be spark plugs or 02 sensors
@EliTheOBDTech5 жыл бұрын
@@Tootoojackson what's the year make aND model of your vehicle?
@wajeehulhassan21823 жыл бұрын
I have 1500cc petrol engine in toyota ...... I tried two maf sensor one giving 1.3 g/s at 650 rpm.... Another giving 1.7 g/s at 650 rpm.... Which one should i use for better fuel economy.....plz reply
@EliTheOBDTech3 жыл бұрын
Normally, you want a MAF sensor that is closest and slightly over the size of the engine. In your case 1.5L engine, you want the one that is showing 1.7 g/s. Ideally your MAF reading should be 1.5 - 1.8 g/s at idle.
@EliTheOBDTech3 жыл бұрын
When a MAF sensor is under reporting is usually due to a vacuum leak or some type of internal leak. Intake or exhaust valve sealing problem or dirty MAF sensor.
@wajeehulhassan21823 жыл бұрын
@@EliTheOBDTech got it....thanks.....how will it effect fuel economy if i use 1.7 g/s maf sensor?
@EliTheOBDTech3 жыл бұрын
@@wajeehulhassan2182 As long as you don't have any other engine driveability problems, you should be getting normal to above average.
@wajeehulhassan21823 жыл бұрын
@@EliTheOBDTech so i should go for 1.7 maf sensor......
@sarsourKBEER7 жыл бұрын
I have negative values. -18 ltft and -12 stft at idle. throws code p0172. car is mazda cx7 2.3 turbocharged. already replaced maf sensor. still same problem. please HELP
@EliTheOBDTech7 жыл бұрын
Assem Karhani It could be many things that affect your air fuel ratio. Since you already replaced the MAF sensor, you can scratch that out. Other possibilities: high fuel pressure, leaking fuel pressure regulator, defective upstream o2 sensor on bank 1, clogged air filter, leaking injectors on bank 1 and perhaps need valve adjustment on bank 1 if applicable on that vehicle.
@Godwillsortyou5 жыл бұрын
Intake cam gear. Pin blows out .
@MrMr1235 жыл бұрын
Where did you get the spec sheet?
@EliTheOBDTech5 жыл бұрын
AllData program.
@EliTheOBDTech5 жыл бұрын
You need one for your vehicle?
@edgarvasquez5735 жыл бұрын
Where do u get value sheets
@EliTheOBDTech5 жыл бұрын
Alldata
@angelpelcastre33285 жыл бұрын
Hello where can I get a print out like that for my vehicle
@EliTheOBDTech5 жыл бұрын
I got this spec sheet print out from ALLDATA.
@EliTheOBDTech5 жыл бұрын
If you need one, give me your email with year, make, model and engine size
@angelpelcastre33285 жыл бұрын
Eli TheOBDTech cool thank you boo3101la@gmail .com 2002 Toyota Corolla ce 1.8
@EliTheOBDTech3 жыл бұрын
@@angelpelcastre3328 sorry buddy, you still need it?
@geoff31728 жыл бұрын
Nice video, have you a copy of the spec sheet you are using....
@EliTheOBDTech8 жыл бұрын
Hello Geoff, I don't have the spec sheet that I was using for that video, but I could email you the spec sheet. what's your email?
@EliTheOBDTech8 жыл бұрын
is it for the same vehicle?
@geoff31728 жыл бұрын
Hi there, I have bought a obd2 scanner with live data, the sheet you use looked a good base for most cars ? Geoff.moores@live.co.uk
@EliTheOBDTech8 жыл бұрын
Geoff Moores most likely just for a Toyota vehicle or with a 3.0L engine.
@geoff31728 жыл бұрын
A Toyota spec sheet would be great, thank you geoff
@albertogamino42644 жыл бұрын
Where can I get a sheet like that for my car
@EliTheOBDTech4 жыл бұрын
What's the year, make, model and engine size? This information can be obtained from AllData or Mitchell ONDemand
@albertogamino42644 жыл бұрын
@@EliTheOBDTech 2006 toyota highlander 2.4L
@EliTheOBDTech4 жыл бұрын
@@albertogamino4264 Can you send me your email? As soon as I get a chance I will email it to you.
@albertogamino42644 жыл бұрын
@@EliTheOBDTech thank you cajgamino@gmail.com
@EliTheOBDTech3 жыл бұрын
@@albertogamino4264 sorry buddy, you still need it?
@stevecano27245 жыл бұрын
15,000 RPM?!!!!!! I didn't know automotive scanners work on jet engines lol
@EliTheOBDTech5 жыл бұрын
Lol, did I say 15,000...? More like 1,500rpm.
@Oleapeps5 жыл бұрын
I have the short ft 3 and long ft 4 at -94.5. What would cause it do go so low. I cleaned the MAF but nothing has changed. Can someone help
@EliTheOBDTech5 жыл бұрын
Are you using generic data or enhanced data? What PID is giving you -94.5?
@EliTheOBDTech5 жыл бұрын
Short term and long term look normal to me, within +/- 10%
@Oleapeps5 жыл бұрын
Eli TheOBDTech generic OBD2, I thought since it’s near -100 that car might be running rich. Ford says I need a new cat but idk what caused the cats to go bad. There is a jerk between 15-30 mph as well.
@EliTheOBDTech5 жыл бұрын
@@Oleapeps perhaps the jerk is due to the pcm subtracting fuel due to a rich condition. Negative fuel trims are usually caused by leaking injectors, leaking fuel pressure regulator, restricted air filter, high signal on the egr valve or faulty oxygen sensor stuck on rich condition 0.8v+. And yes, sometimes a faulty or dirty MAF sensor will cause a rich condition.
@Oleapeps5 жыл бұрын
Eli TheOBDTech alrighty thanks so much. I’ll be taking the car to a different shop. I’m surprised they didn’t look into anything other than the cats
@jnarez19 жыл бұрын
The computer has to relearn so it's going to take a while before everything shows good
@jb65746 жыл бұрын
how did you know it wasn't fuel related but maf related
@EliTheOBDTech6 жыл бұрын
Due to vacuum leaks.
@jb65746 жыл бұрын
what do you mean..could you explain a little more
@EliTheOBDTech6 жыл бұрын
@@jb6574 in this video i did not show my visual inspection of broken or brittle vacuum hoses. Any time your fuel trims start high and decrease as you increase your rpms, that's indication of a vacuum leak which affects your MAF sensor readings. This vehicle had a combination of a dirty MAF sensor and vacuum leaks.
@jb65746 жыл бұрын
Eli TheOBDTech I guess what I meant is without vacuum leaks how did you know it was maf and not fuel related since fuel trims that get higher with increase rpm can indicate either a fueling issue or a sensor issue
@EliTheOBDTech6 жыл бұрын
@@jb6574 This vehicle did not have faulty MAF sensor, it was just contaminated with debris. By cleaning it up, it solved that problem. The biggest issue was vacuum leaks. MAF or fuel related problems tend to show up with low fuel trims and then an increase of fuel trims as you raise your rpms. In this scenario, I removed the MAF sensor and I did a visual inspection to determine if the resistors were dirty with debris.
@ThePremierkitty5 жыл бұрын
can you send me a apec sheet for a vw Bora 2.0 99?
@EliTheOBDTech5 жыл бұрын
Hopefully alldata has one for your car. What's your email?
@ThePremierkitty5 жыл бұрын
Premierkitty@gmail.com
@EliTheOBDTech5 жыл бұрын
I'm sorry to say that Alldata does not provide a spec sheet for your vehicle. Not all manufacturers provide that information.
@AntDuhKnees5 жыл бұрын
I need one of those sheets
@EliTheOBDTech5 жыл бұрын
Email, year, make and model with engine size
@EliTheOBDTech5 жыл бұрын
I will have it for you on Monday.
@edgarvasquez5735 жыл бұрын
Send me one too
@EliTheOBDTech5 жыл бұрын
@@edgarvasquez573 For what kind of vehicle?
@brittanyjerkins126 жыл бұрын
You just told the opposite of the values
@EliTheOBDTech6 жыл бұрын
Low fuel trims that increase when you increase the rpms, dirty MAF or fuel delivery problem. High fuel trims that decrease when you increase rpms, vacuum leak. This vehicle had both problems. Vacuum leaks and dirty MAF sensor.
@trevorferguson82713 жыл бұрын
Higher long-term furl trim most of the time indicates a vacuum leak because the computer is adding more fuel to compensate for extra air getting into the system. Complete opposite of what you’re saying.
@GiotheGhreat2 жыл бұрын
Speak correctly
@jerziballer247 жыл бұрын
vw p0171 bank 1 lean long fuel trim 20% short term 0%
@zeke1129647 жыл бұрын
You have a vacuum leak on that vehicle... find it and your problem is solved!
@garymiller20566 жыл бұрын
A vacuum leak could cause lean condition; he determined it was MAF zeke
@MB-rv9dx5 жыл бұрын
Could the small vacuum leak cause po420? I heard a bad coolant temp sensor can trigger 420 and 430 is that so?
@brittanyjerkins126 жыл бұрын
- fuel trims mean rich conditions + are lean conditions..