idle air valve

[grampahawg]

anyone know if the iac can be cleaned or somehow serviced??

[FestYboy]

Yes, typical failure is in the stepper motor it self (corrosion) and needs resolved.

What exactly is it doing?

[grampahawg]

terrible idle when cold,fast idle when warm,and sometimes perfect.

[FestYboy]

The fast warm idle is adjusted at the manual air bleed screw on the throttle body (flat tip screw on the driver side of the TB). Turning to the right slows the idle. If the screw is bottomed out and the idle is still high, then there is a leak on the back side of the throttle plate (I.e. vac leak or the IAC is not closed entirely).

[grampahawg]

thanx,took iac off to check it,is there supposed to be a small hose with coolant going thru it??

[Greywolf]

Are new motors or other parts available for it? Or is it a generic type that is also used on many other cars that have a similar engine?

[FestYboy]

thanx,took iac off to check it,is there supposed to be a small hose with coolant going thru it??

Yes it's a thermostatically controlled valve attached to the stepper motor. Once the coolant gets warm enough, it causes the valve to close mechanically (much like how a thermostat works)

[grampahawg]

thanx,i really appreciate your help.