1989 Ford E-Series Van engine idles too fast

1989 FORD E-SERIES VAN
140,000 MILES • V8 • 2WD • AUTOMATIC
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DWRIGHT320
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when started the engine idles too fast and continues to do so, even for several miles. But there are times when it will start and run just fine. More often not. Mostly idles to fast. Have checked the idle air control and it seems to work fine. Cleaned it also. Get a check engine lite when I acelerate.
Feb 16, 2009 at 5:33 PM
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MASTERTECHTIM
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sounds liek idle air control valve is sticking open intermittently. if you have not replaced it yet then i would do so because it is such a common problem for your condition
Feb 16, 2009 at 5:40 PM
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DWRIGHT320
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Thank you for your answer. I will try that. I took it off and cleaned it and it seemed to work freely. could it be the temp senser?
Feb 16, 2009 at 6:01 PM
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MASTERTECHTIM
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anything is possible but my money is on the iac motor
Feb 16, 2009 at 6:48 PM