STARTING ENGINE AT APPROX 5 C IDLE ON CAR GOES ...

  • Tiny
  • Anonymous
  • 2004 Toyota Echo
  • 118,000 miles

Starting engine at approx -5 C°, idle on car goes over 2000rpm, press the accelarator for a second then idle fluctuate up and down, then turn of fan switch idle goes back up over 2000 rpm.
When engine warms up after driving for approx 15 to 20 min idle goes back to normal. What can be the cause?

Wednesday, November 28th, 2012 AT 2:23 PM

1 Reply

  • Tiny
  • KHLow2008
  • Expert
  • 41,994 posts

During cold start the engine rpm would be higher than normal and at -5 C , more than 2000 rpm is normal. The surging could be due to a partially stuck IAC that is not responding as quickly as it should. Try cleaning the throttle body and IAC and retest.

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Wednesday, November 28th, 2012 AT 2:50 PM

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