99 4-cyl idle air valve removal

[sixto]

Repost to say idle air valve instead of ISC -

I couldn't find anything in the archives specific to removing the idle air valve in a 99 4-cyl, and there's nothing in the Haynes manual either. I see the idle air valve as a black plastic device attached by two screws to an aluminum housing which is attached by 4 bolts to the bottom of the throttle body. The aluminum housing has [coolant?] hoses attached to it. Do I simply remove the idle air valve or is there more to it than that? Can I get a gasket separately vs part of a bigger kit?

Reason - idle stabilization isn't working as it should. 1 in 20 times it won't hold idle after sitting overnight. All the time it won't hold idle after being parked 2-10 hours. Warm restarts are no problem. When the idle doesn't hold I keep the pedal at 1200 rpm for 30-40 seconds and either the idle stbilization kicks is or it idles at 500 or some low rpm but doesn't quit. Cleaning the throttle body didn't help.

Thanks,
Sixto
99 LE 4-cyl

[terrastrife]

you can just take the iac off, you dont need to take the whole damn thing+lines off but its easier if you do.

[sixto]

Thanks.

I'm not sure I follow. How is it be easier to remove 4 bolts and coolant lines than two screws? I'm not being facetious. It just looks easier to remove the black plastic thing than the aluminum thing it's attached to.

Sixto
99 LE 4-cyl

[sixto]

The black plastic thing isn't the idle air valve. It's just the solenoid or motor part of the valve. The aluminum thing bolted to the trottle body must contain the actual valve.

Sixto
99 LE 4-cyl