Interesting, what are your thoughts?Ground by ECM checked out OK. Took for a spin and about 20 min or so idle dropped off a little. Gradually got worse and started the fluxing. I tried the spray ECM, TPMS and IAC with the dust off computer air. No change. So scratching head I disconnected the plug at IAC and idle returns to stable and about 900 RPM.
The ECM is turning the idle point down ? Does that sound correct?