Actually the system was trying to correct the current condition: O2 sensor 1 was reading a lean condition, so the short term fuel trim was at maximum 1, trying to add more fuel to correct the lambda... But for aome reason was unable to correct it. So you probably have a vacuum leak somewhere. The next step is to raise the rpm to 2500 and see if the short term fuel trim starts to fall down... If so, you have to find the leak...
-1% to +1% on fuel trim is normal. i have a prelude with h22 and it ran +15% fuel trim. if your having fuel trim issues? check your compression and check for vauum leak on intake manifold where the manifold bolts to head on the #1 cylinder. you can thank the new SAE SN spec oil for killing these old engines. they need more zinc in oil than they put in SN spec oil. long term fuel trim follows the stft. so if you have high stft within some time the ltft will rise
Depends on the vehicle that your work, on mine i got 2 (o2 sensors) cuz this a Honda Prelude 2.2L If i hook this scanner to a truck it will show 4 sensors for sure.
YES.. lack of power when you accelerate, your running lean on your air fuel ratio. Take the o2 sensor out and clean it carbon material or some gunk got stuck or replace it with a good new ones
@@jfGarage4k it’s a strange problem this, car flys with maf unplugged but Iv had 3 different new ones fitted and all reduce power so it’s definitely air related so I’m hoping your right mate cheers ! My cat temperature is also off reading -39 when engine is warm ? Could this be o2 relates as well ? Thanks again 👍
My LTFT STFT are - 17... MAF 2.6 on idle and with ac on idle 3.5.. egr error 99.2 sometimes egr fluctuating even negative error... O2 sensor 1 no reading sensor 2 reading is .1 to .9... air fuel ratio commanded and measured fluctuating...
No reading on sensor 1 thats your Primary sensor. Dead sensor need to replace it Make sure your diagnose results are right get the engine heat up on the right temp
I never experience that time of scantool before I'm not sure how they function, its better to get a scanner that ready the afr on primary and secondary o2 sensor. What code did u retrieved from he scanner? Post them up please
Autel has to fix this shit with the fuel trims. It's confusing to read. It needs to show short term long term and Oxygen Sensor 1 and Oxygen Sensor 2 and percentage value right from the bat. I shouldn't be looking for them.
Hi Diosdado! I dont think it's a vacuum issue on frame 2:20 livedata Map sensor reads 32 to 38"psi, manifold is under pressure. If I have leaks my map sensor well read low numbers it well be around 10, 15"psi
@@jfGarage4k Thank you very much for replying. would you mind telling me what is the most recent year car the tool is capable of working on? For example, can it work on the 2017 Megane 205 GT and what functions will it cover
@@philip.aocallaghan4602 my mx808 came with lifetime updates and I just updated all models to 2021. I like my 906 Maxisys better but updates are a fortune. I assume his 808 is lifetime updates also but....
![Chino Pacas - Modo Capone (with Drake & Fuerza Regida) [Video Oficial]](http://i.ytimg.com/vi/zjv8TQ0gBkg/mqdefault.jpg)
Actually the system was trying to correct the current condition: O2 sensor 1 was reading a lean condition, so the short term fuel trim was at maximum 1, trying to add more fuel to correct the lambda... But for aome reason was unable to correct it. So you probably have a vacuum leak somewhere. The next step is to raise the rpm to 2500 and see if the short term fuel trim starts to fall down... If so, you have to find the leak...
Exelent video bro!!!
I meant bad IAC OR VACUUM LEAK that's why RPM fluctuates
Good diagnosis video,thanks for sharing
Yes your welcome, I well be making more videos for this awesome scantool
@@jfGarage4k Good
Very powerful
-1% to +1% on fuel trim is normal. i have a prelude with h22 and it ran +15% fuel trim.
if your having fuel trim issues? check your compression and check for vauum leak on intake manifold where the manifold bolts to head on the #1 cylinder.
you can thank the new SAE SN spec oil for killing these old engines. they need more zinc in oil than they put in SN spec oil.
long term fuel trim follows the stft. so if you have high stft within some time the ltft will rise
Why in mk808 only shows 2 oxigen sensors while there 4!! Any idea?
Depends on the vehicle that your work, on mine i got 2 (o2 sensors) cuz this a Honda Prelude 2.2L If i hook this scanner to a truck it will show 4 sensors for sure.
So what happened? Did you change the 2nd sensor or u just reprogrammed it.
To me it looked fixed!
I tooked out the post sensor and cleaned it good put it back on and samething happened nothing change.
What was the fix..?
My o2 sensor is stuck at 0.01 and doesn’t move ? Up stream ! Could this cause poor acceleration? No engine light thou
YES.. lack of power when you accelerate, your running lean on your air fuel ratio. Take the o2 sensor out and clean it carbon material or some gunk got stuck or replace it with a good new ones
@@jfGarage4k it’s a strange problem this, car flys with maf unplugged but Iv had 3 different new ones fitted and all reduce power so it’s definitely air related so I’m hoping your right mate cheers ! My cat temperature is also off reading -39 when engine is warm ? Could this be o2 relates as well ?
Thanks again 👍
If your "upstream" o2 is stuck @ .01mv then you are running way lean. You'll have no power.
@@MicheluceRizzuto it has terrible acceleration and it’s remapped
Replace both sensors and your set
By which scan tool i can diagnosis Forklifts (Velmet, Meclift, sanny etc) ?
If u know plz give me the name of the tool ... plz
Hi, sorry I'm all about vehicles
Can that read fuel pressure
Yes
My LTFT STFT are - 17... MAF 2.6 on idle and with ac on idle 3.5.. egr error 99.2 sometimes egr fluctuating even negative error... O2 sensor 1 no reading sensor 2 reading is .1 to .9... air fuel ratio commanded and measured fluctuating...
No reading on sensor 1 thats your Primary sensor. Dead sensor need to replace it
Make sure your diagnose results are right get the engine heat up on the right temp
@@jfGarage4k i am using torque pro... i have heared that torque dont read sensor 1. I dont have extended pid for sensor 1.
Honda civic 2012
I never experience that time of scantool before I'm not sure how they function, its better to get a scanner that ready the afr on primary and secondary o2 sensor.
What code did u retrieved from he scanner? Post them up please
Watch my review of the latest autel maxicom mk808bt ruclips.net/video/KkmTCbTkUVw/видео.html
Autel has to fix this shit with the fuel trims. It's confusing to read. It needs to show short term long term and Oxygen Sensor 1 and Oxygen Sensor 2 and percentage value right from the bat. I shouldn't be looking for them.
It's probably not the o2 sensors it looks like a vaccum leak to me
o2 Sensors was lazy need to warm it up to get a good results
I THINK IACV NO WATER
U got bad oaf or vacuum leak
Hi Diosdado! I dont think it's a vacuum issue on frame 2:20 livedata Map sensor reads 32 to 38"psi, manifold is under pressure. If I have leaks my map sensor well read low numbers it well be around 10, 15"psi
This was painful.
He has no idea what he is doing. His fuel trims were fine.
hi
Hello
And so ... what was the result
Replaced both o2 sensors, the old sensors lazy not working right.
@@jfGarage4k Thank you very much for replying. would you mind telling me what is the most recent year car the tool is capable of working on? For example, can it work on the 2017 Megane 205 GT and what functions will it cover
@@philip.aocallaghan4602 my mx808 came with lifetime updates and I just updated all models to 2021. I like my 906 Maxisys better but updates are a fortune. I assume his 808 is lifetime updates also but....
Minor vac leak