I have a 91 3.1L Cavalier I'm fixing up, and I can't find the IAT or any associated wiring, the sensor's port in the side of the airbox is plugged, and there is no nearby wiring to show where It could be located, the only nearby pigtail has the MAP, TPS, and ECT on it, with no other wires cut, missing, or gone. I checked what i believe to be a 92 or 94 Cavalier with the same engine and it has the same pigtail from the main harness, but instead of the ECT it has the IAT. The wiring colors do not match. I am looking for anyone would could either provide me with pictures for the location of their IAT and where it connects to the main harness, or exactly what wires coming out of the PCM are the IAT input, so I can rewire.

 

Still wondering???