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Old 06-18-2004, 11:37 AM   #1
benjaminetanyahoo
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Default Idle screw

Just had a few questions where the hell this screw is located to adjust the amount of air entering the manifold at idle. Is it actually inside the throttle body? Or is it actually inside the IAC solenoid? Anybody got pics or anything to point in the right direction because I'm not in the mood to shell out 250 bucks for a new solenoid to find out it ain't that. Thanks and any help would be appreciated.

Benny
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Old 06-18-2004, 05:31 PM   #2
cRayZee
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Not sure if this is the same for all imprezas. But on my car there's a small phillips screw that's right by the throttle cables just below the throttlebody, locked by an 8mm nut. Loosen the nut and turn the screw to raise or lower your idle rpm.
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Old 06-18-2004, 06:12 PM   #3
benjaminetanyahoo
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I'll check it out, see what happens, is there some kind of marker or something that says where it should originally be at?
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Old 06-18-2004, 10:22 PM   #4
kaos200
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theres no standard spot. It is very touchy though, a small turn makes a big difference.
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Old 06-19-2004, 02:36 AM   #5
THAWA
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You aren't supposed to change the idle rpm It's set be the ecu, and the ecu will sert it correctly.
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Old 06-19-2004, 11:02 AM   #6
8Complex

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Dude, try a junkyard for an IAC... or ask here on the board. $250 is a ripoff.

The idle screw is always in the same place on every car... it is used as a stop on the throttle cable pulley on the throttle body. There is a little right angle at the side it stops on, and the screw is behind that, in another bracket. It's very hard to get to, and very hard to adjust as even a teeny tiny turn will make drastic changes. You really aren't supposed to play with it.
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Old 06-19-2004, 11:10 AM   #7
benjaminetanyahoo
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Yeah I have a intake manifold and throttle body coming in and I'm getting the IAC off of that. If that doesn't fix it then I might just give the idle screw a try. What bugs me is that sometimes, well very rarely it will idle fine in traffic normally after 30 minutes of driving.

Another thing I noticed was if I apply the brakes while idling it effects the idle along with me turning the wheel. If I'm at a light and I make almost a full rotation of the wheel while stopping, idle returns normal for 30 seconds and down it goes again.

Very interesting symptoms, but hopefully this IAC solenoid will do the trick.

Thanks everybody
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Old 06-19-2004, 11:15 AM   #8
8Complex

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Very commonly if you have an issue with a MY00-01 RS idling or running a little funny, it's a front O2 sensor. Are you throwing any CE lights or anything?

Also, just taking a stab since I don't know what year your car is...
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Old 06-19-2004, 11:32 AM   #9
benjaminetanyahoo
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It's a 2002, and I just replaced my front 02 sensor. It has improved my gas mileage and my hesitation while driving, but nothing with idle.
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Old 06-19-2004, 11:42 AM   #10
8Complex

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Hmmmm... the O2's should be the same front O2 sensor, but I'm not sure what else would cause your problem. Does a good ECU reset help at all?
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