'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?
