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International Automotive Technicians Network
'90 K3500 7.4 High Idle?
Posted to Technical Discussion Forum on 3/30/2004 9 Replies

Really need some direction on this one! When this rig is put in gear (auto) at idle, the ECM will start raising the IAC counts in it's attempt to get the idle up above 850 RPM. It will eventually get there, but if it is shifted to neutral at that point, the fl... Login to read more.

9 Replies Received (View Replies)