Certainly could be, but where? I guess I can test the SOV again . . . I believe it was holding vac though. I guess what I don't get is why it is that when I turn the key, the vacuum is released but doesn't kill the engine. However, with the Mity Vac in line, all I have to do is give it one pump (producing about 5" of vac) and she shuts down. What happens to the 15-20" of vac when I turn the key off? Obviously it is going some place. I guess I will test the SOV again and then isolate everything but that line and go from there.

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'95 E300D ("Tank") - 231,000 miles
'79 240D ("Biscuit") - 197,250 miles (Sold)
'83 240D ("Ding-Ding") - 217,000 miles (Death by deer)
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"Back off, man. I’m a scientist” ~ Peter Venkman