I just got an AP1, I'm so happy with it, but the check engine light keeps coming on, the diagnose says its misfiring. I changed the spark plugs to NGK iridium and also changed the coils, to stock but new coils.... After resetting the computer, the light just came back on again.... Any suggestions on what the problem might be?

 

Did u do compression check?

 

usually,...plugs, coilpack, valve adjustment, injectors.

 

What codes is it pulling ?

 

Yes, please provide list of engine codes. We also need more info on your car...

What mods? Specifically, injectors? what did you gap spark plugs to? What kind of gas did you fill up with last? How long has this been occurring ?