mildly rough idle - 97 Aero - Saab 9000 Bulletin Board - Saabnet.com
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mildly rough idle - 97 Aero
Posted by JasonS (more from JasonS) on Wed, 10 Jul 2002 11:01:27
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No codes get sent to Tech on this. Car runs under heavy boost well, but not as well as I suspect it could. At idle or steady throttle position at cruise, the engine seems to hunt for the right blend of everything, and it chenges pitch slightly back and forth. To me this means that a sensor is sending inconsistent or incorrect info to the computer, causing the computer to do a dance around the info to maintain a smooth running engine. I have recent plugs, recently gapped. It runs strong under full boost, so I dont; suspect the DI. After reading pile of messages, I'm leaning towards the O2 sensor. 75k on the car.
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