supercharger - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-08-2009, 05:06 AM   #1
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How does one tell when their supercharger is bad? I just bought a 1996 ssei and it runs great, never misses but gets poor fuel mileage. The air filter is new in case you were wondering. The boost gauge is always negative. It went a tiny bit positive but I was going 115 mph at the time. Any ideas out there?
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Old 12-08-2009, 07:41 AM   #2
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Superchargers don't actually go bad. Bearings and the coupler can wear out and be replaced rather easily.

On not having much boost, I would test the boost control actuator (black canister looking item) and the boost control soleniod (electrical do dad), both are located by the throttle body end of the super charger on the front.
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Old 12-08-2009, 08:26 AM   #3
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