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Gathering a list of things that could cause rough idle

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Old Jul 8, 2012 | 07:58 PM
  #1  
davidjr74's Avatar
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Joined: Sep 2011
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Car: 1985 Camaro Iroc
Engine: 350 tpi
Transmission: 700r4
Gathering a list of things that could cause rough idle

My car , in park and at low speeds, like to jump at idle from 500 to 800 nonstop. Sometimes its erratic sometimes its more controlled...

So far I can think of

-EGR Valve
-Vacumm Leak
-Idle Air Control

and wish to gather a list of more things I need to check. I have a 85 camaro with a 87 camaro 350 tpi.
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Old Jul 8, 2012 | 08:42 PM
  #2  
t-top havoc's Avatar
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From: Mid West
Car: '87 Camaro
Engine: '92 Carb'd 350
Transmission: 700r4
Axle/Gears: factory stock
Re: Gathering a list of things that could cause rough idle

Cracked distributor cap. Crossed plug wires. Timing. Burnt plug wires.
Aluminum // brass mix from plug wires to plug, plug wires to distributor.
Just a few things to check that doesn't take but a few minutes.

My " other " car had a vacuum leak & would go from 900 to 1800 RPM, so that
is a " could be " issue. Our Camaro doesn't have any of the ECM, IAC, etc. Sorry I don't have a solid lead.
Good luck
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