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Rough idle when cold - long S90-V90 1998

uid 11021's pic
posted by  dewfpo on  Sun Nov 30 15:06 CST 2008
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last visit: Thu Oct 23 18:34 CST 2014
[RELATED]

My first thought is temp sensor. The reason I say this is because it should not take 10 miles of driving in 30-40F temps for the temp gauge to move to normal. It should only take 2-3 miles.

You could pull a spark plug and see if it is running lean or rich. A fuel pressure gauge on the fuel rail will tell you if your pump is putting out full pressure. You might be running too lean or too rich.

DEWFPO
--
1998 S90 077,400 and 1995 964 154,100






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