idle problem.

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Jan 25, 2008 | 06:28 AM

98z28bitcha

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From: greenacres,FL

idle problem.

sup guys,Well i hit 100,000 miles and having a idle problem. It would set at 7-800 rpms and jump up to 1,000 then back down. I am saying it is vacuum leak for sure but dont were. I replace the iac already so u count that out.

Thanks for the help.

Jan 25, 2008 | 10:00 AM

keliente

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From: Mooresville, NC

Have you cleaned the throttle body recently?

Jan 25, 2008 | 11:08 AM

Grimes

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From: Northern NJ

is your MAF dirty?

Jan 25, 2008 | 09:50 PM

98z28bitcha

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From: greenacres,FL

I have clean both maf and throttle body.

Jan 26, 2008 | 11:21 AM

98z28bitcha

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From: greenacres,FL

b u m p

Jan 26, 2008 | 11:17 PM

staringback05

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tps sensor

Jan 27, 2008 | 07:32 PM

98z28bitcha

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From: greenacres,FL

I have replace that also. My friend gave me his tuner to check every thing wat should I look for?

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Jan 27, 2008 | 07:41 PM

im2fast4u98z28

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From: Mobile, Alabama

i took the egr pipe out of the intake and cut it. the pipe o-ring isn't that simple to seat. i'm almost positive that mine is leaking there. you might as well try it. it's only like a buck.

Jan 27, 2008 | 07:46 PM

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98z28bitcha

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From: greenacres,FL

I remove it put a plug in place but, that was a while ago. It started week ago i think it is intake leak or a map senor.

Jan 27, 2008 | 07:49 PM

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im2fast4u98z28

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i'm not sure if the map sensor would cause that though???

Jan 27, 2008 | 07:58 PM

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98z28bitcha

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From: greenacres,FL

The map senor located on the back of the intake manifold right? I will take the manifold off this weekend check for leaks and cracks.

Jan 27, 2008 | 08:00 PM

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im2fast4u98z28

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From: Mobile, Alabama

yea it's in the back. good luck

Jan 27, 2008 | 08:03 PM

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98z28bitcha

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From: greenacres,FL

thanks i am goin to need it. I well let know what it is.

Jan 27, 2008 | 08:38 PM

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hpjunky98

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Check the rear line going from the drivers side valve cover to the PCV valve, behind the intake. Mine was completely corroded off at both ends. Also check that the line going to the TB isn't cracked or overly worn. Also i see you have a 98. I would check the EGR seal going into the intake. Thats a very likely culprit. Good luck!!! I know first hand how much of a bitch it is to track down a vacuum leak.