'01 GTP bone stock with 120k on it. Accelerated rough under boost, but it was throwing a #3 injector code, a misfire code, and an O2 code. So I figured it was tied to the bad injector. Replaced the #3 injector and reset the ECU, all the codes cleared. The O2 code hasn't come back yet, but it's still accelerating really rough. I let it warm up and took it to some back country roads and gave it full throttle from a stop. Very rough acceleration, down on power, and it momentarily threw a #2 cylinder misfire code. It seems to be tied to the boost. Around 30-40% throttle with minimal boost it accelerates fine. It idles fine. The muffflers are off right now because I need to repair a weld in the exhaust piping but I don't think that's the problem. Any ideas?
Rough Acceleration
- Thread starter Red01GTP
- Start date
Fivefingerdeathpunch
New member
Re: Rough accerleration
Figure out what cylinder is still misfiring.
Pull the plugs, maybe even just replace them. Inspect the wires and terminal ends on the coils, they could be causing it to run rough.
Figure out what cylinder is still misfiring.
Pull the plugs, maybe even just replace them. Inspect the wires and terminal ends on the coils, they could be causing it to run rough.
Scottydoggs
Killa Bee
Re: Rough accerleration
tune up time if its never been done before.
tune up time if its never been done before.
Scottydoggs
Killa Bee
Re: Rough accerleration
swap coils around see if it moves the misfire. you can also move the plug and the wire one by one, trying to make the misfire move.
swap coils around see if it moves the misfire. you can also move the plug and the wire one by one, trying to make the misfire move.
Sleepinl67
New member
Re: Rough accerleration
Check the white part of the plug(it's called porciline but I can"t spell it right), It may have carbon tracking on it. Carbon tracking looks hair line cracks, I had the same problem with mine. I switched to NGK TR6 plugs and new OEM wires and problems where solved.
Check the white part of the plug(it's called porciline but I can"t spell it right), It may have carbon tracking on it. Carbon tracking looks hair line cracks, I had the same problem with mine. I switched to NGK TR6 plugs and new OEM wires and problems where solved.
buickman104
New member
Re: Rough accerleration
The plug in that picture doesn't look new at all. It looks as bad as my 15,000 mile plugs I changed out yesterday.
The plug in that picture doesn't look new at all. It looks as bad as my 15,000 mile plugs I changed out yesterday.
Sleepinl67
New member
Re: Rough accerleration
I'd recommend NGK TR6. They are working great for me so far!
I'd recommend NGK TR6. They are working great for me so far!