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Old 05-27-2002, 05:01 PM
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Join Date: May 2002
Posts: 7
Unhappy Car "diesels" after I shut it down, 92 300D 2.5T

I have checked the vacuum lines and they seem Ok, also the vacuum line going into the shut off diaphram has vacuum when I shut it off. When I shut down, the shut off lever moves down but not quite enough to turn off the engine. Any ideas?

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Old 05-28-2002, 01:50 PM
Fimum Fit
Posts: n/a

**************.com -- Mr. Bergsma has got a useful little manual on vacuum diagnostics. I suspect that your problem is in the shut off diaphragm itself.

I'm nursing a similar problem right now, and have found that raising the engine speed to about 1200 to 1500 rpm before shutting off the key switch will generate enough extra vacuum to make it work every time, although it's not good for the turbo.
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Old 05-28-2002, 03:16 PM
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Join Date: Apr 2002
Location: Columbus, Ohio
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Probably isn't good on the engine either. Having the extra fuel in the cylinder is bad on it, at least that's always been my understanding. If I rev it before I shut it off I always let it run a little longer to let it come back done and run at 750 for a bit.
1984 190D 2.2 Auto 220k
2001 Jeep Cherokee Sport 70K
2004 Lexus RX-330 ??K
2005 Chrylser Crossfire LTD 6K

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Old 05-29-2002, 01:27 PM
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Join Date: Feb 2000
Location: Columbus Ohio
Posts: 709
I had the same problem when I had a 300D 2.5 at about 150K miles a few years ago....they out a new vacuum pump in the car and the problem was solved

good luck

1992 300SD
Columbus Ohio

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