high idle no radiator fan

1993 FORD TEMPO
142,000 MILES
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CARDUMMYLEARNING
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Check engine light works when key switched on. No trouble code, check engine doesn't light when operating car. Real high idle at cold start, slows down some after running a few minutes, but still too high. Car will run 40 without touching gas. No power to fan when car heats up or when switching on defroster. I do get the everything ok code key on engine mkmoff.
Jan 12, 2012 at 11:24 PM
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BMRFIXIT
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suspect bad IAC
also check for vacuum leaks
Jan 13, 2012 at 12:13 AM
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CARDUMMYLEARNING
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Would that also affect power to radiator fan
Jan 13, 2012 at 12:23 AM
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BMRFIXIT
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if no power to the fan and engine running hot
check fuses ,relays ,wiring and coolant sensor
Jan 13, 2012 at 12:31 AM
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CARDUMMYLEARNING
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Can you tell me what the control voltage from computer to the relay box fan relay should be and what color wire or which pin its on? Also I only see one temperature sensor mounted on the thermostat housing. The temp gauge in the dash works. Is there another temp sensor on the engine or is that the one the computer uses for idle control and fan operation?
Jan 13, 2012 at 12:41 AM
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BMRFIXIT
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what do you have for engine size
Jan 13, 2012 at 12:45 AM
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CARDUMMYLEARNING
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The engine is a 2.3 four cylinder and the car is automatic w/ac.
Jan 13, 2012 at 1:46 AM
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