WHY IS MY TRUCK IDLING SO HIGH

  • Tiny
  • edavis2012
  • 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
  • Member

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
  • Expert
  • 18,993 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

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
  • Member

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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