Idles extremely high at times?

AKMANDAL

MEMBER
2002 FIAT PALIO
4 CYL
2WD
MANUAL
54,000 MILES

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.

Tuesday, November 23rd, 2010 AT 11:15 AM

1 Reply

BORIS K

MECHANIC
799 POSTS

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

Image (Click to make bigger)