running a little lean on 2002 Chevrolet Camaro

My fuel trims have gone lean over time. I have cleaned the maf sensor and checked the fuel pressure and it's good.

by in Garden Grove, CA on November 25, 2009
1 answer 2 comments
ANSWER by on November 25, 2009
What is the long term & short term numbers?
COMMENT by on November 25, 2009
The long trims are + 6-10 while crusing. The short trims for the driverside can go up to + 12 for a sec. The long trims used to read - while crusing.
COMMENT by on November 25, 2009
Anything below 15% is normal. These numbers are good. You might get them better by doing a complete Fuel Injection Service. If you want to know more about this e-mail me at It's refreshing to read that you know what to look for. E-mail me.
Related Items:
With a maf plugged in the car runs very lean an thus pings badly. I cleaned it with a maf cleaner and tried another maf and still pings badly. If I unplug the maf no running lean and pinging. This...
Running a little lean with bad mpg and low power. Tried another mass air sensor, tps sensor, fuel filter, checked fu...

Related Content