I have a 06 Cobalt SS which has the GM stage 2 kit installed. I decided to log a pass to see what everything looks like and found that my L trims were very slightly positve(1-3) while driving but when at go WOT the L trims go negative(approx 3) in the mid rpm range. Is this common with these cars or do I have a problem that needs to be corrected? Thanks in advance

 

I don't believe they pull fuel in the newer pcm's, I know for a fact negative trims don't pull fuel at wot in Gen 4 V8 pcm's such as the E40/E38/E67, I could only assume its the same principle applied in your pcm.

 

Thanks for the quick response.

 

thats not much of a response.

it will affect wot fueling.