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Why is my truck idling so high

Tiny
EDAVIS2012
  • MEMBER
  • 1995 CHEVROLET TAHOE
  • 220,000 MILES
It is at 1500 rpm after the replacement of egr valve, iac connector and valve also the throttle position sensor when I turn the truck on it idles below 1k rpm for about 10 seconds then the rpms increase to 1500 rpm and thats where it remains once the engine heats up
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Tuesday, January 10th, 2012 AT 2:57 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try cleaning the IACV/TB and check the TPS closed and WOT voltages-start here
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Tuesday, January 10th, 2012 AT 3:06 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Maybe vacuum leak was throttle plate cleaned? Was high idle problem before parts replacement? Check engine light on? Do you have acess to a scanner?
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Tuesday, January 10th, 2012 AT 3:07 PM
Tiny
EDAVIS2012
  • MEMBER
  • 3 POSTS
I check for leaks with carb cleaner and listened for changes in idle speed, nothing, my check engine light only comes on when the truck is in gear at a stop. I thought it might be my tps so I tested and replaced it. I have left my battery unplugged for a half hour to reset the ecm after I replaced my egr valve, iacv and connector and tps.
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Tuesday, January 10th, 2012 AT 3:22 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
It probably has to relearn the idle speed due to battery disconnection-scan the computer for code/s
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Tuesday, January 10th, 2012 AT 10:02 PM

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