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-   -   Engine shutoff vac leak on 350SDL(126) (

wilton 05-19-2001 07:20 PM

Evidently, I have a vac leak somewhere. 91 350SDL intermittently does not shutoff w/key. Couple of searches for likely culprit founbd nothing amiss, i. e., cracked/loose tubes, etc. 'Noticed no prob so far w/brake boost, rest of cac sys, etc. Wher is most likely cuplrit; at the key switch or IP? Any tips? TIA

Benzmac 05-19-2001 11:01 PM

Could be a vacuum leak or a faulty vacuum shut off element.

wilton 05-20-2001 12:31 PM


I agree.

wilton 05-24-2001 02:58 PM

Dealer tech replaced IP shut off actuator day before yesterday. Parts $44; labor $130!!!!!!!! Car in shop about 1.2 hr.

WDurrance 05-24-2001 03:33 PM

So can we assume that the problem was resolved? The shut off diaphragm on the 603 motor isn't the easiest to get at. If the guy can do it in 1.2 hours, it's one of the benefits of practice. You get quicker, not slower. The first one I did on a 300SDL in 1990 took a good me hour to figure out that the intake was supposed to come off...but I learned.
Randy D.

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