[kermet]

car idle fluxulates when hot and idling high wont idle down. anyone with ideas please.

[Gonzo]

kermet wrote:

car idle fluxulates when hot and idling high wont idle down. anyone with ideas please.

That very interesting Mine does opposite. It has a slight miss when it's cold , have had it hooked up to all sorts of crapp at mechanics , He recons it's all fine But admitts it sound rough, But when it warms up ? All gone !!

[shandy92]

hi, i had simular probs with mine.
the mechanic found a crack in the intake manifold, so i got that replaced a long with another throttle body. fixed the prob.

hope that helps somehow.

Mitch

[Taff]

I had a similar problem

http://www.auszookers.com/index.php?nam ... pic&t=4222

Turned out to be the pipe that runs from the IAC valve to the thermo housing was full of crud.

[mnemonix]

Have you checked for vacuum leaks?

[MacDaddy]

kermet wrote:

car idle fluxulates when hot and idling high wont idle down. anyone with ideas please.

Oops my bad, just saw it is an EFI motor, lol...

[royce]

yep check for vacuum leaks on every hose, mine was a small leak in a few hoses all compounding into enough to cause trouble

clean your airflow meter with some contact clean too

[ninjadaniel]

high idle will be caused by many things, e.g. faulty temp sensor, faulty throttle position sensor, both of these will cause a check engine light though.

There is a coolant hose going through the bottom of the intake manifold, inside there is a motor that spins and either allows water through or blocks it, i believe this is to heat the air that passes through the throttle body, if this is rusted shut then it will cause your exact symptoms.

[royce]

no there is 2 seperate sections there

there s the IAC which is a valve that the ecu uses to bleed air around the throttle body to up the idle spedd when the ac is on or the lights or whatever

there there is a waxstat thingo that when cold does the same thing, the coolant heats it up and it blocks off the extra air, same thing as a sierra auto choke almost

[kermet]

thanks for the help guys just took it back to the mechanics they can deal with it cheers kermet

[ashbee37]

hey kermit, did you find the problem. my sons is driving me nuts. one minute it works properly next minute it mucks up. some how its connected to a/c as well ahhhhhhhhhhhhhhhhhhh