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Old 06-27-2013, 05:19 PM   #1
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Question idle and misfiring problem, need some input

Hello /o/, I could use some other opinions on a problem I'm having.

I have a 1995 Camaro with a 3.4L in it, it sat up for about 3 years, got a replaced timing chain and harmonic balancer about a year ago, I think I replaced one of the packs on my coil pack, checked plugs and wires though, everything is firing and at higher RPMs the problem stops, usually after 1500. It sounds like a cylinder is missing or something, but I'm not sure what's causing it anymore. Checked vacuum lines as well, everything is connected and has vacuum.

VID 20130627 00012 - YouTube
This is how it sounds and behaves when the problem occurs, it doesn't seem to be an airflow problem, and it gets plenty of gas. RPMs are below 1000 when this happens, almost ready to die and it will if I let it. later at around 42 seconds, I put it into reverse and let it roll back in idle, then come back up.

VID 20130627 00013 - YouTube
This one is of how it is supposed to sound and behave. I turned it off for a minute and restarted it, and it idles perfectly at 1k, no choking or sputtering or backfiring.

I've spent the last 3 days now trying to fix this **** wagon, I would be grateful if anybody can offer some insight to what my problem is. Maybe it's the ignition control module? any input would be appreciated.
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Old 06-27-2013, 05:34 PM   #2
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I would clean the idle air control valve, and do a resistance test on the throttle position sensor with a multimeter.
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Old 06-27-2013, 07:01 PM   #3
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Quote:
Originally Posted by NavyVet View Post
I would clean the idle air control valve, and do a resistance test on the throttle position sensor with a multimeter.
So I went ahead and cleaned up the IAC, and some pretty thick black stuff came off, looks like just an excessive amount of carbon, but pending further test runs in a bit, if it does alright today and tomorrow then I will clean the entire throttle body and see how it does, but I already see some improvement, thanks for the advice
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