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unstable high idle with 1988 GMC S15 pickup 2.8L fuel injection
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dance
New User
Oct 23, 2008, 1:01 AM
Post #1 of 5
(3448 views)
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unstable high idle with 1988 GMC S15 pickup 2.8L fuel injection
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I have a 1988 GMC S15 pick up. The idle is not stable and floating between 1600-1800. Is there anyone knows what this problem could be? Your answer will be very much appreciated.
(This post was edited by Tom Greenleaf on Oct 23, 2008, 1:37 AM)
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DanD
Veteran
/ Moderator
Oct 23, 2008, 3:00 AM
Post #2 of 5
(3442 views)
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Re: unstable high idle with 1988 GMC S15 pickup 2.8L fuel injection
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Check that the gasket between the throttle body injection (TBI) unit and the intake manifold hasn’t failed. This was a very common problem that a section of the gasket would break away allowing un-metered air (vacuum leak) to enter the engine. Dan. Not sure what you had written for Tom to edit your post but I know he would have had his reasons; just be careful what you type. Canadian "EH"
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Oct 23, 2008, 4:43 AM
Post #3 of 5
(3438 views)
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Re: unstable high idle with 1988 GMC S15 pickup 2.8L fuel injection
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Great suggestion Dan as usual. I simply removed a hyperlink that and should have said that in first post. Copied posts from other sites come with their ads in hyperlink form. The post reads exactly as it was posted..... T
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way2old
Veteran
/ Moderator
Oct 23, 2008, 6:00 AM
Post #4 of 5
(3435 views)
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Re: unstable high idle with 1988 GMC S15 pickup 2.8L fuel injection
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Must have come from trustmymechanic. Answered it over there too. Good answer Dan. Now he has at least 3 of the samwe answers. Being way2old is why I need help from younger minds
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dance
New User
Oct 31, 2008, 12:48 AM
Post #5 of 5
(3408 views)
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Re: unstable high idle with 1988 GMC S15 pickup 2.8L fuel injection
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Thanks Dan! I will check that out and let you know.
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