Hello all. Just wanted to see if I was missing something in my investigation into my 88 T-bird 2.3T idling >1300 rpm.
So far I've checked the Vane Air Flow (MM volt test), Vane Air Temp (MM resistance test) , ECT Sensor (MM VOLT/Resistance) , ACT (MM VOLT/Resistance) , EVR (you get the point), BMAP, TPS, ISC-BPA, HEGO.
When I unplug the ISC/IAC the idle gets lower. That's why I checked all sensors I thought could be effected. Seemed more computer driven than a vacuum leak.
Any ideas moving forward?
Appreciate the help
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