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Old 08-09-2003, 05:43 PM
Registered User
Join Date: Aug 2003
Location: Oostburg, WI
Posts: 2
Question diesel run on, and on, and on.

I recently inherited a 93 300D 2.5 turbo from my grandfather. I am interested in anyones help in diagnosing this problem: The car does not stop running once the ignition is turned off. Also, the stop lever on the injection pump looks out of position (points up more than before) I think it might have something to do with the engine shutoff vaccuum motor.(?) Once the key is turned off the engine idle decreases slightly. I have been looking for publications on repair manuals and have found none. I would also like to reap the bennefits of maintaining this vehicle on my own, if it permits. Help?
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Old 08-09-2003, 06:07 PM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,878
welcome aboard

Get yourself a "Mighty Vac" and start learning all you can about your car and vacuum leaks. That is probably your problem.
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Old 08-09-2003, 07:59 PM
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Probably the vac servo on the IP -- exactly the same behavior my 300D exhibited. The diaphram has a small leak.

Do a search on vac shut off or vac cuttoff replacement, details are all there. Easy job, just make SURE it works before you start the engine!

1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!
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