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Old 02-22-2004, 10:12 AM
Registered User
Join Date: Feb 2004
Posts: 1
Vacuum System

Hey everybody! New members and glad to have found these excellent boards.

1) We have an intermitting problem with the brakes and the fuel shut-off on a 1983 240D.
Could this have something to do with the vacuum pump malfunctioning?
The problem occurs intermittingly and is not connected to the engine temperature.

2) Cruise control: The set-accelerate-lever will accelerate, but when released, the cruise control does not set.

Any ideas? Thanks in advance.

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Old 02-22-2004, 10:20 AM
jcd jcd is offline
village idiot
Join Date: Jun 2001
Location: Northern New Jersey
Posts: 1,102
It might be as simple as a vacuum leak in one of the lines.

If everything operates normally with the drivers door locked, then you can rule out the door locking system.

You should then check the lines under the hood and make sure they all hold vacuum. If not that is your issue and you can repair the line or the connector that led to the leak.

Vacuum system leaks just require time and structure, basically a process of ruling things out, and isolating the problem.

Do a little diagnosis with a vacuum tester and post the results.


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