Tireburner-
I still need you to reset the ECM like I described above, and retest both KOEO and KOER. What I'm looking for is to see whether or not any codes come up that are new while the problems are occuring. If you reset the ECM, and upon retesting don't set any codes, yet the idle miss is still there, than the previous codes aren't the cause.
Something else you can try the next time the idle miss happens is to unplug the IAC connector (provided the engine is warmed up) and see if the problem changes.
Take care,
-Chris
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