WHEN STARTING TRUCK WHEN IT IS COLD OR WARM IT ...

  • Tiny
  • Chooch1
  • 1998 Chevrolet Silverado
  • 300,000 miles

When starting truck when it is cold or warm, it does not switch off of high idle. When driving for awhile it still does not switch off, once you put it in park it is still on high idle at about 1200rpm. I clean the carburator and idle control valve and it still does not change anything.

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Saturday, December 1st, 2012 AT 11:43 PM

1 Reply

  • Tiny
  • rasmataz
  • Member

-Check/Test the throttle position sensor and look for vacuum leak-also clean out the throttle body/plate-inspect accelerator linkage/cable-Also go to this link: http://www.2carpros.com/articles/engine-idles-too-high

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Sunday, December 2nd, 2012 AT 1:00 AM

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