low trim at 80%

[ericlws66]

Car is stock except for k&n and uicp, boost controller but currently at stock boost.
Got the datalogger hooked up then run some logs, and my low fuel trim is at 80%, mid at 100, and high at 100.
So i reset ecu. and then logged it again, same thing.
Reset again then logged like two days later and same thing.
What would a boost/vaccum leak do to the fuel trim? Im guessing what it is doing right now.
thanks

 

[kpt4321]

Nope, not a vacuum leak. A vac leak would make the fuel trim go over 100.

If the car is stock, don't worry about it too much. There is nothing you can do.

Hack the MAF a little bit, it'll come up real quick.

 

[Zenja]

I'm guessing it might possibly be a dirty IC or generally other little restrictions in airflow from old age.

 

[kpt4321]

A dirty intercooler won't change the fuel trims.