T tla11384 New member Aug 8, 2008 #1 I put a magnaflow cat converter on my truck and now the check engine light won;t go off. The code is saying to much air. Do you know if that will mess with the gas mileage? thanks
I put a magnaflow cat converter on my truck and now the check engine light won;t go off. The code is saying to much air. Do you know if that will mess with the gas mileage? thanks
