I had 550s and it was missing hard, I put the 440s back in with a stock AFM and still the same problem I have good spark at all 6 coils. I replaced the plugs and wires, noda. My AFC shows a good signal from the AFM. The motor is completely stock now except for a boost gauge and a boost condroller. It won't idle it just dies it strugles to rev up even with it floored in neutral. Its missing on 1 or 2 cylinders. I checked compression and it was good 140-132PSI. My boost gauge reads 0 Vacuum at 1000 RPM or less and 8 PSI at 1000 Rpm plus until it builds boost while struggling to rev up to 4000. Any Ideas
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- Thread starter kevinb6825
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