Bucking and SSSStuttering turbo - Saab 900 Bulletin Board - Saabnet.com
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Bucking and SSSStuttering turbo
Posted by Steve W (more from Steve W) on Sun, 29 Feb 2004 15:17:42
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I am having a little problem with my 91 turbo that I can't quite pin down. First, my boost control valve is on it's way out as it regularly reverts from base boost to normal boost. But when it decides to give me full boost, it will start hesitating and bucking right when it gets up to the full boost position, just at the end of the yellow. Anything below full boost and it runs great. I don't think the boost control valve can cause these symptoms and was more inclined to think it was something in the APC system detecting knock or the like in one of the sensors and shutting things down. My other thought was that if the spark plugs were worn they might not be up to the task at full boost which could be causing the system to pick this up and act accordingly. Any other suggestions?
Steve
posted by 216.83.100...
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