Hello,
I have a 2004 Pontiac GTO w/5.7 & automatic over the winter I had a bunch of work done to the car performance wise like a bigger cam,headers,pulley,roller rocker,thermostat,3.5"driveshaft,3600 yank stall,3.90 gears,trans cooler,zo6 maf,nitrous wet kit dyno tuned w/100 shot. It ran fine all summer until a couple of weeks ago it started very mildly sputtering and a little backfire when deaccelerating then it got a little worse with the sputtering but it is usally after a few minutes of driving before it acts up. I reset the computer and it ran fine for a few days then right back to the same thing and before I take it back to try and duplicate on the dyno I would like to have an idea of what it could be. Please help! :( P.S it does not have any engine codes. Also has 42000 miles.
I have a 2004 Pontiac GTO w/5.7 & automatic over the winter I had a bunch of work done to the car performance wise like a bigger cam,headers,pulley,roller rocker,thermostat,3.5"driveshaft,3600 yank stall,3.90 gears,trans cooler,zo6 maf,nitrous wet kit dyno tuned w/100 shot. It ran fine all summer until a couple of weeks ago it started very mildly sputtering and a little backfire when deaccelerating then it got a little worse with the sputtering but it is usally after a few minutes of driving before it acts up. I reset the computer and it ran fine for a few days then right back to the same thing and before I take it back to try and duplicate on the dyno I would like to have an idea of what it could be. Please help! :( P.S it does not have any engine codes. Also has 42000 miles.
Nov 9, 2007 at 8:56 AM