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

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!!!

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!

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,

I liked the way you when over the long term fuel trim.

Best explanation yet that have found for MAF.Thank you

You're the greatest. Keep the videos coming.

@EliTheOBDTech

6 жыл бұрын

Steven McHenry Thanks. I should resume soon with videos.

Great explanation

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.

@EliTheOBDTech

5 жыл бұрын

Good valid points!!

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.

@EliTheOBDTech

5 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.

@ulisesquintero1219

8 ай бұрын

@@EliTheOBDTech hi i have toyota tacoma 2008 how i can reset the long term fuel ?

@EliTheOBDTech

8 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.

@EliTheOBDTech

8 ай бұрын

I'm not 100% sure if disconnecting the battery for at least 20 mins will do trick.

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.

@EliTheOBDTech

3 жыл бұрын

Thanks for your good analysis my friends.

Thank you very much

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

I have a 2015 Tacoma 4.0 code of p2438 it's has a limp mode where should I get started

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.

@EliTheOBDTech

4 жыл бұрын

For sure

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.

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?

@EliTheOBDTech

6 жыл бұрын

Jim Stelljes sorry for the delay. I'm pretty sure you can use same spec sheet.

@EliTheOBDTech

6 жыл бұрын

Jim Stelljes I'm thinking that you may have a fuel delivery problem or an idle air control valve issue.

@jimstelljes3925

6 жыл бұрын

Thanks.

Hi Eli I was wondering if you would be able to get a spec sheet for a 2010 camaro 3.6l

@EliTheOBDTech

5 жыл бұрын

What's your email?

Just want to say great vid. I was wondering , where did you find the sheet that you have with all the specs?

@EliTheOBDTech

6 жыл бұрын

Otis George Through All Data program. What vehicle do you have?

@donnarobinson699

6 жыл бұрын

Can you send one to me. 2002 dodge Caravan Sport 3.3L v6 Gas

@EliTheOBDTech

6 жыл бұрын

What's your email?

@EliTheOBDTech

6 жыл бұрын

Hey Donna, unfortunately AllData does not provide a Spec Sheet for your vehicle. Sorry.

@abdulbeany1894

9 ай бұрын

Hi do you have a spec sheet for audi a4 b7 2.0 tdi bre engine thanks

Think the relearn of fuel trims only happens in closed loop

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.

@EliTheOBDTech

9 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.

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.

@EliTheOBDTech

5 жыл бұрын

Not all manufacturers provide that information, but if they do, what's your email?

@armang10

5 жыл бұрын

@@EliTheOBDTech sedautov@gmail.com

@EliTheOBDTech

5 жыл бұрын

@@armang10 Alldata only provides ecm pinout values, still very useful. Is your vehicle a U5/Low emission vehicle or non-U5?

@armang10

5 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!

@EliTheOBDTech

5 жыл бұрын

@@armang10 Perhaps in the emissions label under hood or in the valve cover. I'll just send u both.

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.

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?

@EliTheOBDTech

3 жыл бұрын

I would say, it's a combination of a dirty/faulty MAF sensor, dirty injectors and even some type of vacuum leak.

Eli how do you check fuel delivery problems?

@garymiller2056

5 жыл бұрын

Check pressure and voluume, Andrew

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!!!

@EliTheOBDTech

3 жыл бұрын

What kind of vehicle are you looking for? Not all manufacturers give out that information.

@EliTheOBDTech

3 жыл бұрын

I would need to look at the program to give you a good answer.

@Informed104

3 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

@EliTheOBDTech

3 жыл бұрын

@@Informed104 I'm glad you found your way around this data sheet.

very nice tutorial. do you have specs for 2006 DODGE CHARGER SXT V6 3.5L thank you

@EliTheOBDTech

5 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?

@armang10

5 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

@jerrypeal653

4 жыл бұрын

Likely going to be about 3.5 gm/s

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.

@EliTheOBDTech

2 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.

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?

@EliTheOBDTech

6 жыл бұрын

dunilka rathnayake I'm sorry, but I'm not really understanding your question?

@tamisonsresources3396

5 жыл бұрын

I think what he's saying is if the Mass Air flow sensor was replaced, would this problem be resolved?

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 :)

@EliTheOBDTech

4 жыл бұрын

Hopefully, sometime today. Can you send me your email?

. 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

@EliTheOBDTech

2 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.

Where do you get that chart? I need one for a 2012 civic si

@EliTheOBDTech

3 жыл бұрын

I get them from either AllData or Mitchell. Unfortunately, Honda/Acura does not provide that information on AllData or Mitchell.

Hey in all data do I just search value sheet to find that printout

@EliTheOBDTech

4 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

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.

@EliTheOBDTech

5 жыл бұрын

Send me your email and year make and model of your vehicle

@Elniniss

5 жыл бұрын

Eli TheOBDTech 2007 Scion tC eliasbarajas@yahoo.com

@EliTheOBDTech

3 жыл бұрын

@@Elniniss Sorry bro, for this late response, you still need your spec sheet?

Is this sheet useful for all kind of cars or it is specific one I mean this readings are general

@EliTheOBDTech

5 жыл бұрын

These are mainly for Toyota, Lexus, Scion vehicles. General specs for fuel trims are +/- 10%.

@santa255

5 жыл бұрын

@@EliTheOBDTech Could you send it for me if u plz Peak5838@gmail.com Thanx in advance

@edgarvasquez573

5 жыл бұрын

Send one too bigpimptoyota@gmail.com

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

@EliTheOBDTech

6 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.

@GrimReaper-ly8zk

5 жыл бұрын

Intake cam gear. Pin blows out .

Would an issue with o2 sensors cause the same numbers?

@EliTheOBDTech

5 жыл бұрын

Usually an O2 sensor will either have a steady rich or lean condition.

@dm7097

5 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.

@teravolt6113

5 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).

@dm7097

5 жыл бұрын

@@teravolt6113 ok thank you, never really thought about that before. Awesome.

What range should the mass be on a 2008 trailblazer 4.2

@angelf9800

3 жыл бұрын

Fdz0007@yahoo.com

@EliTheOBDTech

3 жыл бұрын

@@angelf9800 It should be between 3-6 g/s and BARO should be 60-104 kPa (varies with altitude)

@EliTheOBDTech

3 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.

Seems that LT fuel trims under load < +- 10% are normal. Don't see any need for further diagnostics with those parameters.

@EliTheOBDTech

6 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.

@EliTheOBDTech

6 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

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

@EliTheOBDTech

7 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.

@arthurfricchione8119

7 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

@Gtblender

7 жыл бұрын

Hey I have a nissan murano 2006 v6 can you get one for me?

@EliTheOBDTech

7 жыл бұрын

steven gangaram yes I can. What's your email?

@Gtblender

7 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..

Hi mr Eli... could you please send me specs for 2001 celica 1.8, i love watching all your videos.

@EliTheOBDTech

5 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.

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"?

@EliTheOBDTech

5 жыл бұрын

What kind of vehicle do you drive?

@ILoveCycNails

5 жыл бұрын

@@EliTheOBDTech dacia logan 1.4 2005

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!!

@EliTheOBDTech

8 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.

@EliTheOBDTech

8 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.

@andrewcjeffrey

7 жыл бұрын

Do a vacuum leak check (propane or smoke machine)

Where do u get value sheets

@EliTheOBDTech

5 жыл бұрын

Alldata

Should have replaced the MAF. Much less expensive and time-consuming instead of other rabbit holes.

Can you get the data for a 2005 lexus es330?

@EliTheOBDTech

3 жыл бұрын

When I get a chance, I will. Can you send me your email

@EliTheOBDTech

3 жыл бұрын

@@JJ-rd2ef Expected sometime this weekend.

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

@EliTheOBDTech

4 жыл бұрын

Not all manufacturers give out data values on AllData or Mitchell OnDemand.

@EliTheOBDTech

4 жыл бұрын

I'll check to see if BMW has one for your vehicle.

@isrealperez9069

4 жыл бұрын

@@EliTheOBDTech thank you cause I can't find anyone to tell me what I looking for God bless you

@EliTheOBDTech

4 жыл бұрын

@@isrealperez9069 Sorry buddy, unfortunately BMW does not provide Data sheet values on AllData or Mitchell OnDemand.

@EliTheOBDTech

4 жыл бұрын

How's you're fuel trims looking like at idle and 2500 rpms?

Where did you get a printout of normal readings?

@EliTheOBDTech

4 жыл бұрын

AllData

@Charkatak

4 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.

@EliTheOBDTech

4 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.

@Charkatak

4 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.

Where did you get the spec sheet?

@EliTheOBDTech

5 жыл бұрын

AllData program.

@EliTheOBDTech

5 жыл бұрын

You need one for your vehicle?

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.

The computer has to relearn so it's going to take a while before everything shows good

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

@EliTheOBDTech

5 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?

@Tootoojackson

5 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

@EliTheOBDTech

5 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.

@Tootoojackson

5 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

@EliTheOBDTech

5 жыл бұрын

@@Tootoojackson what's the year make aND model of your vehicle?

Hello where can I get a print out like that for my vehicle

@EliTheOBDTech

5 жыл бұрын

I got this spec sheet print out from ALLDATA.

@EliTheOBDTech

5 жыл бұрын

If you need one, give me your email with year, make, model and engine size

@angelpelcastre3328

5 жыл бұрын

Eli TheOBDTech cool thank you boo3101la@gmail .com 2002 Toyota Corolla ce 1.8

@EliTheOBDTech

3 жыл бұрын

@@angelpelcastre3328 sorry buddy, you still need it?

Hi sir can you help me with diagram sheet for lexus is250 2006? I have similar problem with my sensors. Great job! 🎩

@EliTheOBDTech

4 жыл бұрын

I need an email

@alexandrudavid

4 жыл бұрын

@@EliTheOBDTech hi sir yahoo.com this is my email and Thank you so much for your help

@EliTheOBDTech

4 жыл бұрын

@@alexandrudavid hope you can be patient, I should have your data sheet by Wednesday. I'm going out of town.

@alexandrudavid

4 жыл бұрын

@@EliTheOBDTech it's ok don't worry. 👍

@alexandrudavid

4 жыл бұрын

Hi Eli Please let me know when you send me. Thank you ✌️

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?

@teravolt6113

5 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.

Nice video, have you a copy of the spec sheet you are using....

@EliTheOBDTech

8 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?

@EliTheOBDTech

8 жыл бұрын

is it for the same vehicle?

@geoff3172

8 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

@EliTheOBDTech

8 жыл бұрын

Geoff Moores most likely just for a Toyota vehicle or with a 3.0L engine.

@geoff3172

8 жыл бұрын

A Toyota spec sheet would be great, thank you geoff

scannerdanner says that high negative ltft at idle and high positive ltft at high rpm this is dirty maf sensor.

@EliTheOBDTech

2 жыл бұрын

Yes, that is correct.

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

@EliTheOBDTech

5 жыл бұрын

Are you using generic data or enhanced data? What PID is giving you -94.5?

@EliTheOBDTech

5 жыл бұрын

Short term and long term look normal to me, within +/- 10%

@Oleapeps

5 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.

@EliTheOBDTech

5 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.

@Oleapeps

5 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

vw p0171 bank 1 lean long fuel trim 20% short term 0%

Where can I get a sheet like that for my car

@EliTheOBDTech

3 жыл бұрын

What's the year, make, model and engine size? This information can be obtained from AllData or Mitchell ONDemand

@albertogamino4264

3 жыл бұрын

@@EliTheOBDTech 2006 toyota highlander 2.4L

@EliTheOBDTech

3 жыл бұрын

@@albertogamino4264 Can you send me your email? As soon as I get a chance I will email it to you.

@albertogamino4264

3 жыл бұрын

@@EliTheOBDTech thank you cajgamino@gmail.com

@EliTheOBDTech

3 жыл бұрын

@@albertogamino4264 sorry buddy, you still need it?

can you send me a apec sheet for a vw Bora 2.0 99?

@EliTheOBDTech

5 жыл бұрын

Hopefully alldata has one for your car. What's your email?

@ThePremierkitty

5 жыл бұрын

Premierkitty@gmail.com

@EliTheOBDTech

5 жыл бұрын

I'm sorry to say that Alldata does not provide a spec sheet for your vehicle. Not all manufacturers provide that information.

I need one of those sheets

@EliTheOBDTech

5 жыл бұрын

Email, year, make and model with engine size

@EliTheOBDTech

5 жыл бұрын

I will have it for you on Monday.

@edgarvasquez573

5 жыл бұрын

Send me one too

@EliTheOBDTech

5 жыл бұрын

@@edgarvasquez573 For what kind of vehicle?

15,000 RPM?!!!!!! I didn't know automotive scanners work on jet engines lol

@EliTheOBDTech

5 жыл бұрын

Lol, did I say 15,000...? More like 1,500rpm.

SO, WHAT WAS THE FINAL DIAGNOSES?????????????????????????????????

@EliTheOBDTech

2 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.

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

@EliTheOBDTech

3 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.

@EliTheOBDTech

3 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.

@wajeehulhassan2182

3 жыл бұрын

@@EliTheOBDTech got it....thanks.....how will it effect fuel economy if i use 1.7 g/s maf sensor?

@EliTheOBDTech

3 жыл бұрын

@@wajeehulhassan2182 As long as you don't have any other engine driveability problems, you should be getting normal to above average.

@wajeehulhassan2182

3 жыл бұрын

@@EliTheOBDTech so i should go for 1.7 maf sensor......

how did you know it wasn't fuel related but maf related

@EliTheOBDTech

5 жыл бұрын

Due to vacuum leaks.

@jb6574

5 жыл бұрын

what do you mean..could you explain a little more

@EliTheOBDTech

5 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.

@jb6574

5 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

@EliTheOBDTech

5 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.

You just told the opposite of the values

@EliTheOBDTech

5 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.

@trevorferguson8271

3 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.

You have a vacuum leak on that vehicle... find it and your problem is solved!

@garymiller2056

5 жыл бұрын

A vacuum leak could cause lean condition; he determined it was MAF zeke

@MB-rv9dx

5 жыл бұрын

Could the small vacuum leak cause po420? I heard a bad coolant temp sensor can trigger 420 and 430 is that so?

- fuel trims mean rich conditions + are lean conditions..

Speak correctly