Hi,
I am experiencing a missfire at about 16 PSI. The van pulls hard up to the 16 psi then it starts breaking up. At the time it starts breaking up ( missing) I get CEL on for what I am guessing is knock. I dont hear any knock and the light does not go on at all when it is not missing. It is pretty consistant at 16 psi at Part throttle. I did not try WOT. I pulled about 2 degrees of timing out at this point but it is still there and I still get the CEL. I am running the Turbonator ( last years version) 3 bar 40 + cal. I am running the autolight AR51 plugs. The plugs look fine. AFR's are around 11.3 when it does this. When it starts missing the AFR's go up to the high 12's low 13's but that is probabily because the missfire is not burning the fuel and causing the O2 to think its lean. I am not sure if mabe I have a weak coil. Has anyone ever experienced a problem like this or recommend where I should start looking.
Thanks,
Justin