[andyd00]

Ok this thing has 120k miles on it. The plugs have 20k on them. They're performance plugs but i don't remember what i put in it(mabey plat-4's) This thing misfires like crazy at idle and anywhere below 1200 rpms. Any other range and its fine. I noticed when it missfires it feels a lot faster. When it rarely doesnt missfire the car runs kinda like a gt. So i had it scanned at the hobby shop and all the computer told me was random missfire all cylinders. So the coils can't the prob. The plugs are farely new and so as the wires. I just came from autozone today from testing the ignition module and it tested good. Tthis problem started when the car was stock. Now it has cold air intake and 3.4 pulley.

Has anyone seen this before? Whats the next step too go? If a sensor went bad the computer would tell me right? Are these things have magnetic trigger since its distributerless? Could a SC coupler cause this. Cause it is bad, it rattles when it missfires and i noticed some play when changing the pulley. I was planning on buying a performance pcm and hoping a case learn might fix it.

Thank you for advice in advance.