Question, If I flash a new ECU using GM TIS and then use hptuners I have an issue that appears. The idle is commanding 744 RPMs. I have tried every learn function in the snap on scanner but no luck. This is in a hot rod. Something is missing. If I use a used E92 and reflash with a new OS it will idle at 500 rpm. Anyone know how I can figure how to find what is commanding the high idle?
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