Hey, thanks for looking at this, any help is appreciated.
My car is a 2003 zo6, with GM asa cam, a&a kit with 60lbs injectors, kooks exhaust, Racetronics in-tank pump. The car was dyno tuned and made good power by a trusted person in my town a couple of years ago. I don't drive this car very much and a couple of weeks ago I changed the oil and it has a strong smell of gas. It has always smelled very rich when standing behind the car but I never thought twice about it. Well after the oil change I decided to hook up the hpt and scan it. After starting the car in the garage with in 2 minutes the LTFT go positive 25 on both banks. That explains the rich condition or lean however you want to look at it. I thought why would the car think its lean? vacuum leak? I smoked the intake and found no leaks, got 2 new Denso O2 sensors. The car has no cats or rear O2s. A new GM MAF, checked fuel pressure 58 psi, replaced the header gaskets, replaced the intake gaskets, checked the vac port on the back of the intake. I have a breather on the pass. valvecover and vac plugs on the ports and on the TB. My check valve is good on the brake booster and the A&A supplied one that goes to the valley plate is good too. Yesterday I drove the car around the block and it runs great and after it got up to temp I let it idle and sure as shit the LTFT go to 25+. So I think the source of the problem is in the tune. I don't know shit, but this is my guess. Again, thanks for your help.
2003 Chevrolet Corvette Z06 - DTM - Carl Gentile.hpt
very rich new maf.hpl
Carl