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
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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