Question about 1991 Oldsmobile 88

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Loss of power and gas mileage due to vaccum leak. looked at all vaccum lines and can not see any leaks but the cruise will not maintain and the damper for the hvac will drop until load is lessed from the engine. I have just changed the oil,filter-air filter-fuel filter-spark plugs and have changed sum questionable vac hoses and the problem is still there bad.

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What Year? My 91 had a vaccum leak due to a bad seal on the small distribution block located by the throttle body.

Posted on Feb 03, 2009

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