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rough idle and service engine soon light?

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Old Aug 1, 2007 | 02:09 PM
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Default rough idle and service engine soon light?

last night i noticed on my way home, my car at idle at a light, was kind of idling rough, between 400-600 rpm up and down, and at some points felt like it was about to die, i didnt think much of it cause i was tired, but this morning when i left for work i noticed it was doing the same thing, only when i was about a block away from work, it threw a service engine soon light. the car is stock other than a lid that i put on a month or so ago, and open y pipe. it has 95,000 on the clock now, any ideas what it could be? it hasnt had plugs and wires in a long time, but i doubt thats it..
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Old Aug 1, 2007 | 02:44 PM
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anyone? i hope it gets me home from work without dying..
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Old Aug 1, 2007 | 03:09 PM
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Check the code an post it up. Sounds like it could be a misfire. What does it do when you accelerate?
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Old Aug 1, 2007 | 03:49 PM
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My guess would be O2's. Check for codes.
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Old Aug 1, 2007 | 03:56 PM
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runs great under acceleration, just misses a lil slowing down coming to a light and idling.
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Old Aug 1, 2007 | 03:56 PM
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what about in cold starts? does it do it?
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Old Aug 1, 2007 | 03:59 PM
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My bet: EGR valve stuck open causing a rich condition at idle......almost sounds like you got a cam idling but runs fine otherwise. Get the code scanned & you'll have your answer.
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Old Aug 1, 2007 | 04:09 PM
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If it's good under acceleration, not a misfire. Now, I'm also leaning towards O2 or EGR, get it scanned Too bad we can't figure these things out without a scanner....
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Old Aug 1, 2007 | 04:20 PM
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haha your telling me. but yeah it almost does sound like it has a cam at idle. it did it cold start up this morning too, just not as bad as it did after it was warmed up. i hate thinking somethings wrong with my baby
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Old Aug 1, 2007 | 06:11 PM
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if it did it at cold start then its probably not your o2 sensors, its probably your egr valve stuck open.
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Old Aug 1, 2007 | 07:25 PM
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The EGR is an easy fix. Just get rid of it if emissions are no problem.
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