Quote:
Originally Posted by hotanddry
It's a short video; I had to put it on repeating loop to try and figure out your morse code message. LOL
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This may be my problem. I checked my IAC and I get 12.3 ohms (good). No continuity between either terminal and the housing (good), but when I connect 12 volts to the IAC contacts I get no click (bad). The wiring harness going to the IAC seems to carry 7 volts. When I pull the IAC air hose off the air horn I feel a strong vacuum (good) and when I put my thumb over the hose, the engine slows (good) but when I disconnect the IAC wires, nothing changes (bad). My mileage recently dropped from 25 (mostly city) to 18 (bad). The Tracker is a 1994 8valve, two door auto. It starts instantly when COLD. It idles very fast for a few seconds and then slows slightly. After the stat housing gets hot, the idle drops lower and the engine sounds good. If I shut off the engine for more than a few seconds I can only restart if I hold the gas pedal to the floor and it still takes 5 seconds of cranking. Everything is new (plugs, wires, cap , rotor, fuel filter, air filter.) The EGR valve is clean and working. The fuel pressure regulator is good and the only code I get from the OBD-1 is a constant "12." I'm pretty sure the problem is the IAC. What steps are involved in removal (e.g. do I need to drain the coolant) and how do I fix the problem (short of buying a new very expensive IAC)? Do I really have a problem or does everything I've described sound normal for an old 1994 Tracker?
