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Intermittent rough idle
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Posted by JSB (more from JSB) on Mon, 6 Oct 2003 10:40:10 Share Post by Email
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Ok folks, need your help on this one. On some occasions, very intermittent I might add, I get a temporary rough idle on start up; almost like a miss on one cylinder. Car is a '93 CS 9000 non-turbo/automatic. Has happen with both hot and cold engine. It varies how long it takes for the misfiring to subside, from 3-4 seconds to 30-60 seconds. It will clear up if the car is in Park or being driven. When the problem clears up, it's like a switch being flipped from rough idle/running to a smooth running motor. I'm not sure about the first time it happen, but yesterday it happen twice and it was rainy/damp out. Wondering if a moisture problem could be the culprit (?).

It's almost like bad gas or watery fuel but if this were the case I would suspect it to do it all the time and not come and go. It never happens while driving, only after shutting the car off and restarting moments to minutes later. Any thoughts on this one or things to check?

TIA
JSB

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