Fuel Trim question

[v-mac]

my car messed up and wont go anywhere, the check engine light came on and ran a computer on it and it came up with fuel trim... also my turbo is gone and i have to buy a new one for it but would this fuel trim problem cause my car to not be able to drive or my turbo to mess up, or did a messed up turbo possibly cause this problem? any help is appreciated

 

[v-mac]

ahh im not sure i will have to check it again, but would it be possible for the fuel trim to keep the car from running? its like it cuts on but wont go anywhere and its not the trans.....im guessin the turbo bein messed up aint helpin much either with the auto tranny

 

[viprez586]

For us to accurately diagnose your car, you need to type with proper spelling, grammar, etc.
This makes it MUCH easier for us to read AND understand.
You also want to be very descriptive and include the important information.
I'm not trying to be a d!ck, I'm trying to help you.

If your car is running terribly lean you could have severe problems with your car running properly. A bad turbo will also give you driveability problems - which is a perfect time to upgrade to a 14b or 16g if your still on the stock turbo.

You can read about fuel trims and what they are here: TMO Datalogger 101

Here:Logger Tuning

And Last but not least:fueltrimupdatepoints [ECMTuning - wiki]

I highly recommend the last link but it does get pretty technical.
The more time you spend on this website and just researching in general the more knowledge you will acquire and be able to diagnose the car without the need of going to the computer.

G'luck!

 

[v-mac]

ill check the code again and have it on here, its at my dads shop right now...but it starts up and idles fine...when it happend it sounded like the engine was knockin but then it stopped, it just wont go anywhere and the check engine lite came on with fuel trim"i will get the code asap"....heres a play by play....my turbo started actin funny the day before this happened but i shrugged it off...i noticed if i stuck at 5psi sometimes it would hold the boos tbut then sometimes randomly out of nowhere my turbo would make a fluttering noise and loose the boost...the next day driving was when my check engine light came on...and it seemed that everytime i would try to floor it, the car would go to 4000rpm and go no where like the turbo could not boost or something and one timeon my way back home i did it again and the car messed up...i could go the same speed around 65 that i was previously at but couldnt accel at all...and when i rolled into a parking lot and parked her maybe 30 seconds after this happend, it was as if she would not excel at all...first off i thought i threw a rod for some odd reason even though this car had a brand new engine in it because it sounded as if it was knocking, but when i got her towed to my dads shop and looked closer, i noticed the turbo blade was somewhat shattered or just broken in some places, and then i checked the check engine lite and it showed fuel trim...as i said ill get the code for you to see....but when is tart it up now it wont knock any so i know its not a rod but the car just wont go anywhere like its a constipated person it just wont go...and i know the tranny is fine....but im guessin the combo of a bad turbo and fuel trim problem maybe running lean is not good for it and that could possibly be causing it, but im hoping someone on here mite be able to shed some more light, i just thought a whole play by play may help a bit for anyone trying to understand what happened....

 

[v-mac]

also i am upgrading to the evo 8 big 16g i have it ordered just waiting on shippin, and bought 650 injectors for it as well...

 

[toofast82]

also i am upgrading to the evo 8 big 16g i have it ordered just waiting on shippin,

Good luck installing evo8 turbo! Be sure to take plenty of pics and make a writeup
Hope you mean evo3

 

[v-mac]

yes you are right its evo 3

 

[solidviper89]

I would try to fix your fuel trims problem before attempting the turbo upgrade.

 

[viprez586]

Yep, you need supporting mods before you just go ahead and throw the turbo on. Don't just go throw on parts without knowing what your doing and why first. It's best to devise a plan before you begin to buy parts, otherwise you end up spending more money in the long run.
Do some research on this site, but don't expect spoon feeding - this topic has been cover thousands of times.



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