LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Car idles low! Can I adjust it?

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Old Jun 7, 2005 | 01:36 AM
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Black1995Z's Avatar
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Car idles low! Can I adjust it?

Well, just as the title says... it idles like at 550 and today after a nitrous run it died. I just need it higher... when it idles that low it stumbles a little; at around 900 it feels great and straightens itself out.
Old Jun 7, 2005 | 02:12 AM
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Re: Car idles low! Can I adjust it?

Originally Posted by Black1995Z
Well, just as the title says... it idles like at 550 and today after a nitrous run it died. I just need it higher... when it idles that low it stumbles a little; at around 900 it feels great and straightens itself out.

Can you adjust it?????
Probably the Iac needs cleaning but ya can turn up the idle screw.
Old Jun 7, 2005 | 02:22 AM
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Re: Car idles low! Can I adjust it?

Originally Posted by 1racerdude
Can you adjust it?????
Probably the Iac needs cleaning but ya can turn up the idle screw.
Cleaned it when I last took my intake manifold off (1.5 weeks ago), where is the screw? I'm missing the screw on the upper right hand corner of the TB behind the throttle cables, I hope thats not the one.
Old Jun 7, 2005 | 02:48 AM
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Re: Car idles low! Can I adjust it?

Originally Posted by Black1995Z
Cleaned it when I last took my intake manifold off (1.5 weeks ago), where is the screw? I'm missing the screw on the upper right hand corner of the TB behind the throttle cables, I hope thats not the one.
That's it. Driver's side behind the cable arm parallel with the intake.Need to get one so the blades don't jam and ya can get air to idle.
Old Jun 7, 2005 | 08:26 AM
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Re: Car idles low! Can I adjust it?

Idle speed is controlled by the computer. Turning the idle stop screw will let more air in, but the computer will compensate by telling the IAC to change position to achieve the set idle speed.
Old Jun 7, 2005 | 02:49 PM
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Re: Car idles low! Can I adjust it?

Are you sure your car doesn't need a tune? Mine idles smooth as a babies butt at around 500-550 in gear. The only time you can feel it in the seat some is if I'm idling in traffic for a bit.
Old Jun 7, 2005 | 02:54 PM
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Re: Car idles low! Can I adjust it?

Now you're starting to worry me. I have an SES light and as soon as I get scanned I'll know whats up. I just hope its an easy fix.
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