idles extremely high at times?

2002 FIAT PALIO
54,000 MILES • 4 CYL • 2WD • MANUAL
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AKMANDAL
  • MEMBER
  • 1 POST
Idles extremely high sometimes. Compression ok. New crank sensor. Throttle body cleaned. No check engine light, however, sometimes TPS reports no voltage on OBD scan.
Nov 23, 2010 at 11:15 AM
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BORIS K
  • ✓ASE Certified Mechanic
  • 836 POSTS
  • ASE Certified Mechanic
Hello,

Unfortunately you do not specify if your vehicle has the 1.2 or 1.6 engine fitted.
The Idle Air Control valve(IAC) is fitted as part of the throttle body on the 1.6 engine. On the 1.2 engine the IAC is separate and can be replaced or serviced on its own.

Please see picture attached of the IAC.

How to replace the IAC, clean and check

https://youtu.be/f7mBFM0s2Ew

Please let us know how you get along.

Cheers, Boris
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