Senior **i.e. OLD** Member
Did you do the IAC test (resistance) after the car has been running a while?See my previous posts in this discussion. After it warms up and I shift into neutral and come to a stop rpms drop below idle. Also, hesitation. ISC passed multimeter tests. Asked above if both brown and black isc were metal as I have a plastic black one installed new 5000 miles ago and was told that the heat can destroy them quicker.
Heat does strange things to bad electronics...