I am looking into an SEC 560 1990, In idle the engine is a little rough (shaking) and in low rpm and idle the oil pressure gauge rattles. noticed a little kick when shifts from second to third otherwise it drives well.

Could it be a vacuum hose issue or it needs a valve job?? car has 129,000 miles and seems to be taken care of.

Thanks.

Well, shaking can be any Number of things..worn motor mounts, vacuum leaks, worn ignition (incorrect plugs are common these days), suspect injectors, over due O2 etc..

@ 129K here in the heads should be Good for @ least another 40-50K minimum.

Jonathan

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Blue Ridge Mercedes
Jonathan Hodgman
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Enthusiast Service, Restoration & Tuning.
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