98 blazer 4.3 revs up and down??

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Aug 2, 2011 | 09:03 PM

finetune

Thread Starter

New Member

Joined: Jun 2011

Posts: 4

98 blazer 4.3 revs up and down??

need help! holding the pedal at about 1500 rpm in park the tack will go up and down, it does it driving at lower speeds too, already replaced a lot of new parts. thanks

Aug 9, 2011 | 04:15 PM

Frog

Starting Member

Joined: Nov 2010

Posts: 146

From: Corinth,TX

Yours doing something similar to this??

http://www.youtube.com/watch?v=aOOvp..._order&list=UL

Last edited by Frog; Aug 9, 2011 at 04:19 PM.

Aug 9, 2011 | 04:47 PM

swartlkk

Administrator

Joined: May 2005

Posts: 41,329

From: Waterloo, NY

A/C compressor kicking on & off?

Aug 9, 2011 | 04:48 PM

pettyfog

BF Veteran

Joined: May 2011

Posts: 2,257

From: SW Central OH

Disconnect IAC, still do it?

Aug 10, 2011 | 06:47 PM

badata1

New Member

Joined: Aug 2011

Posts: 7

throttle position sensor or idle air control valve maybe?? might want to go more into detail about lots of new parts

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