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Rough idle, check engine light

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Old 02-09-2006, 09:12 PM
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Rough idle, check engine light

Ok, maybe not rough idle, but my car runs wierd when it's idling. The rpm's will hold between 1000-1500 and every so often (i'd say 3-5 seconds) the rpms dip for just a second and then come back up to the idle speed.

It's like the computer's trying to lower the idle, but can't do it or something.
Any ideas what the problem is?

Also, there's a check engine light, could this be related to the idle issue?
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Old 02-10-2006, 11:39 PM
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Check the IAC (Idle Air Control) or run a diagnostic code test on it.
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Old 02-12-2006, 04:54 AM
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i think i'm gonna take it in...
and just tell them to fix it.
i've gotta have my ride goin by this spring!!!!

i'm tired of sitting and waiting for it to be fixed...
tho i'm slow at fixing it.
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Old 02-12-2006, 10:01 AM
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Alright. Let me know what they find out.
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Old 02-13-2006, 02:03 PM
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run the code
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Old 02-13-2006, 02:31 PM
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what do i need in order to run the code?
should i take it into a shop to do that?
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Old 02-13-2006, 02:51 PM
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find a buddy with a red brick (code reader) or i think some places do that for like 20 bucks
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Old 02-13-2006, 05:19 PM
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get a haynes manual and a paper clip, or spend about 10 bucks on a reader at any parts store
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Old 02-13-2006, 06:45 PM
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10 dollars??? what kind of reader is this? Ive always only known the expensive ones (snap on)
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Old 02-14-2006, 01:22 AM
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Paper clip is the quickest and cheapest way to do it. Thats what i always used on my 3rd gen.
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Old 02-14-2006, 04:38 PM
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Originally Posted by mxracerbrian
10 dollars??? what kind of reader is this? Ive always only known the expensive ones (snap on)
obd1 can use a cheapy the snap on one is the same as the lower priced ones that sell for about $175 at most parts stores
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Old 02-14-2006, 04:41 PM
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yeah at my work, we have a couple of them. The snap-on one was a lot more than 175! i think it was well over a $1000!
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Old 02-14-2006, 04:44 PM
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snap on = way over priced the tech1 that the dealership I worked at used was only $200, a tech2 runs around $300 off the trucks, or about $200 through the supplier that makes them
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Old 02-14-2006, 04:48 PM
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yeah snap-on is really overpriced but thats the brand of choice for my field. Everyone will give you a "lifetime warranty" but that doesnt help you much when your on a job fixing equipment so they can continue working and then a tool breaks! I own a lot of snap-on tools....thier worth the money!
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Old 02-14-2006, 04:52 PM
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I own one snap on tool (and it's broken) I prefer mac or their parent company stanley (take a stanley to any wal-mart and they replace it no questions asked even when it shows abuse)mac has mailed me repalcements for screwdrivers that I used as prybars
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