Surging Idle and Hesitation/Bucking when driving - Saab 9000 Bulletin Board - Saabnet.com
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Last night as I was passing traffic on the interstate shortly after entering full boost I heard a noise similar to flatulence coming from the left front simultaneous with an extreme loss of power. The engine thereafter would only pull strongly for a couple of seconds followed by a repeat of the loss power. If I attempted to let the engine idle it would continuously pulsate between near stalling and about 2200 RPM. I have checked for vacuum leaks and have not found any split hoses or disconnected lines. Any thoughts about how to diagnose this problem? My car is a 91 9K with 128K miles.
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