Mechanics

CHEVROLET SILVERADO HIGH IDLE PROBLEM

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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Chooch1
December 1, 2012.



-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


Rasmataz
Dec 2, 2012.