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Old 08-19-2002, 01:46 AM
Johnson Chan
Posts: n/a
Car stalls

This is for my 92 300D 2.5 turbo. For a year now, my car has this intermittant problem. Just after starting the car and backing out of the parking spot, the car will stall and you have to restart.

After the restart everything is fine. Sometimes after pulling out and putting in drive it will stall. This used to happen very very rarely, now its more frequent than before.

Where do I start troubleshooting an intermittant problem like this? Thanks in advance.

P.S. sometimes in stop and go driving on the free way at low speeds (like 3 mph or something) after i let off the accelerator it will stall and i have to put in neutral and restart.
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Old 08-19-2002, 08:21 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
How bout an OVP.

Seems like such a cure all (bg), but I am serious. The idle control system is powered by the OVP relay. Since it isn't working, maybe it isn't turned on. Like the KE systems the diesel idle system is very good at "limp home". Almost like it doesn't exist, except...

There also is a base idle setting that I would have to read about to explain, but it is an external adjustment.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 08-23-2002, 05:15 AM
Johnson Chan
Posts: n/a
Hello Steve,

Thanks for the reply. So is a OVP relay easy to fix for a do it yourselfer? Is there any testing i could do?

If i bring it to the dealer its hard to replicate this problem, after i made this post, it hasnt stalled on me since, lol.
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Old 08-23-2002, 06:10 PM
Registered User
Join Date: Jan 2002
Location: Colorado Springs, CO
Posts: 1,006
Hi Johnson,

The OVP takes a few seconds to change. It caused erratic behavior on my car, started by killing A/C in city traffic. Then one day driving home the ABS light came on, and I think the tach may have zero'd out (in addition to no A/C). I stopped by the mechanic who pulled the OVP, said he couldn't believe it was in there that long ("antique" was his words ) and he put in another one and no problems since!

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