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Old 12-03-2014, 11:36 AM   #1
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High idle

My 91 GT runs great. However I've noticed lately that it idles just fine yet when I leave and have to stop at a light while in neutral it runs a high rpm. Only way to get it down is to shut off the engine and restart it. Any ideas, MAF sensor? Bad idle control valve?


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Old 12-03-2014, 04:41 PM   #2
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Run your codes.
Clean your MAF.
Clean your IAC.
Vacuum leak somewhere?????
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Old 12-03-2014, 04:45 PM   #3
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Ok thanks for the Info. What's the best thing to clean it all with?

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Old 12-04-2014, 01:08 PM   #4
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MAF cleaner. NOT carb cleaner.
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Old 12-04-2014, 03:55 PM   #5
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Quote:
Originally Posted by scottydsntknow View Post
MAF cleaner. NOT carb cleaner.
Will a dirty carb cause the car to idle high like that? Haven't cleaned mine in awhile and it randomly started idling almost 1500 rpm at a stand still..


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Old 12-04-2014, 04:33 PM   #6
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Yours is carb converted?
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Old 12-04-2014, 04:58 PM   #7
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Quote:
Originally Posted by scottydsntknow View Post
MAF cleaner. NOT carb cleaner.
Will a dirty carb cause the car to idle high like that? Haven't cleaned mine in awhile and it randomly started idling almost 1500 rpm at a stand still..


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Old 12-04-2014, 05:00 PM   #8
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Quote:
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Yours is carb converted?
Yes, sry dunno y it reported last post


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Old 12-04-2014, 05:19 PM   #9
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Mine is not a carb. Fuel injected

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