Hi,

My mods are : 2,5 " cat back, without cat (cavalier 2005)

When I accelerate rapidly, I have constants missfires (running on 3 cyl), CEL flashing. So I have to drve like a grandfather...

I had the same problem when I had a turbo, blew an engine, bought a used one (12k km) and I have the same problem (without turbo).

Is that because I removed the cat? Or do I have an ECU problem? (constant CEL too)

I'm using new spark plugs and injectors.



http://aemecotec.monchar.com/

from my past history with misfires, I would check the map sensor, and fuel pressure. (including vacuum lines and voltage at fuel pump with a digital meter. I had 2 volts drop with the stupid GM wiring.)


HP Tuners | Garrett T3/T04B | 2.5" Charge Pipes | 2.5" Downpipe | 650 Injectors | HO Manifold | Addco front/rear | Motor Mounts | HKS SSQV | Spec stage 3 | AEM UEGO Wideband | Team Green LSD | FMIC | 2.3 cams | 2.3 oil pump swap | 280WHP | Now ECOTECED