My Mercedes Diesel is Dieseling

[Brandon]

To CD or any other benz expert, my '80 300sd (w116) won't stop running with the key! I know there is some kind of vacuum device on the injection pump that controls this but I do not have much knowledge about these cars. Any advice or websites about this problem is appreciated! TIA

[jgerock]

Jeremy - I cannot recall what the issue is, but I remember the problem from the late '80's. If I'm not mistaken, there is a manual lever on the pump to cut the fuel off (and stop the engine).

I've had good luck asking questions here http://www.benzworld.org/forums/login.php?do=logout&logouthash=e40181076db16c48cebdf5c5df6004d6

[Brandon]

Jeremy - I cannot recall what the issue is, but I remember the problem from the late '80's. If I'm not mistaken, there is a manual lever on the pump to cut the fuel off (and stop the engine).

I've had good luck asking questions here http://www.benzworld.org/forums/login.php?do=logout&logouthash=e40181076db16c48cebdf5c5df6004d6

Hey Jim thanks for the info. Yes there is a 'stop' lever on top of the engine to stop the thing running. This is what I've been doing every time I drive the car and I'd like to get it back to stopping with the key.

[bent]

There's a vacuum pull mechanism on the back of the injection pump that shuts the fuel off when you turn the key. That could be bad, or there could be a lack of vacuum to pull the mechanism, caused by a leak or faulty vacuum pump. If you replace the pull mechanism, be careful and make sure that the linkage is engaged correctly, otherwise it could jam the pump to full fueling and rev the motor to redline upon start up (with no good way to shut it off.)

[jgerock]

Those late '70's and '80's Benzes had lots of little check valves installed all around the car - especially the central door locks. Drove all mechanics crazy chasing ills.