Thread: 420 SEL Violent Engine Shake
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Old 01-09-2002, 11:43 PM
Stan Pittman Stan Pittman is offline
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Join Date: Apr 2001
Location: Beech Island, S.C.
Posts: 468
sounds like a major vacuum leak to me. Check the check valve between the intake manifold and the brake booster. If that's ok check the vacuum line going to the transmission modulator valve.
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