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
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1 answer 2 comments
ANSWER by , November 25, 2009
What is the long term & short term numbers?
COMMENT by , 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 , 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.