Idling Problem

1986 PONTIAC FIERO
97,696 MILES • 4 CYL • 2WD • MANUAL
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ROBERTO1
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Hey, My fiero idles very high at 2.5 rpm,it used to idle at 1.5. It won't idle down for about 10 mins, and if i drive it before it idles down it gets really shaky and doesn't drive good. Any tips?
Sep 10, 2011 at 3:10 PM
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JACOBANDNICKOLAS
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Check for vacuum leaks. If the check engine light is on, have the computer scanned for trouble codes. (I believe they had the OBD1 in 86).
Sep 10, 2011 at 5:31 PM
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ROBERTO1
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The check engine light isn't on and after I've drove it and turn it off for about an hour, I start it and it idles high at 2.5 rpm but then I press the gas and it goes down to 1.5 rpm, do you think it could be the idle control valve?
Sep 10, 2011 at 7:00 PM
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JACOBANDNICKOLAS
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It could be. It could be a simple vacuum leak too. Please bear with me. It's is difficult when the car isn't in front of me. I would recommend checking for vacuum leaks. If you don't find any, then I would move to the control valve.
Sep 10, 2011 at 7:21 PM
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ROBERTO1
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Yeah ill do that and ill tell you what I find, thanks a lot I appreciate your help
Sep 10, 2011 at 7:24 PM
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JACOBANDNICKOLAS
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I just hope I provided help. It is hard to do when I'm not right there with you. Take care and let me know.
Sep 10, 2011 at 7:35 PM
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ROBERTO1
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ok, I checked the whole engine, no vacuum leaks, and I was just wondering, how do you clean the idle control valve? and how much is a new sensor?
Sep 19, 2011 at 8:45 PM