jumping idle

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Nov 8, 2004 | 10:43 PM

89tracerman

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From: Arizona

jumping idle

when im in a stop light my idle jumps from about 1400 rpm to like 1600rpms up and down

Nov 8, 2004 | 10:51 PM

89tracerman

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From: Arizona

any idea why?

Nov 8, 2004 | 10:52 PM

WAYNE88N/A

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From: Coldspring TX

Umm, vac leak? Idle adjusted too hogh mechanically? TPS?

What have you checked so far?

Nov 8, 2004 | 10:57 PM

89tracerman

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From: Arizona

it usto run at 750 rpm but one day it started running 2000 rpm i lowered the idle with a screw driver and it only went down to 1500 rpm i moved the top screw.

Nov 9, 2004 | 12:57 AM

WAYNE88N/A

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From: Coldspring TX

Sounds like a vac leak to me. You need to tweak the idle screw back to where it was & find the problem....

Nov 9, 2004 | 01:29 AM

H4Inf

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From: The World

I have a similar problem.. With the idle screw completely in, she's idling at about 1300.. and when I first start up the idle is jumping up and down between 900 and 1300...

Nov 9, 2004 | 10:17 AM

MarkPerez

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Joined: Jun 2001

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From: SoCal.

i had a idle problem and i replaced the bac valve and that seemed to help but the real problem was the cruise control cable, so i was the position of the throdle that was in limbo. vacum leaks also