engine has high idle when started for the first time of the day about 50% of the time

1993 BUICK LESABRE
180,000 MILES
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JOHNPATRICKGREELEY
  • MEMBER
  • 1 POST
There appears to be no vacumm leaks, cleaned the throttle body, replaced iac motor, still idles high on first start, doesn't idle high on any later starts, thanks, John
Aug 13, 2012 at 2:50 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Test the throttle position sensor closed and WOT voltages
Aug 13, 2012 at 3:07 PM
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