Please help! Im new to this site, and im a new owner of an 87 300d. I bought the car not running. It ended up being the lift pump (pre pump) was stuck. Cleaned it and got the car running. However, it wouldnt die. Even the stop lever wouldnt kill it. I pulled the fuel line to kill it. Ive bee reading up on it, and have replaced the bad hoses and tested with my mityvac pump. While running, also tested vacuum from the pump. So, pump and vacuum valve seem good. What is most puzzling is, the stop lever seems limp. When there is vacuum applied the lever wants to hang down. When the engine is off and hose removed from the vacuum valve, the lever can be pushed to the up position. Would a bad vacuum valve (the vacuum shut off valve) cause the stop lever to not work? I have searched google and have not found any info as to why the stop lever wouldnt work. Please help! Im still investigating why the ignition wont kill the engine, but id like to not have to plug the air intake to kill it. Thanks!

I'm not familiar with that engine, so bear with me.

If the shut off control has failed, that should not affect the manual lever.

I'm guessing a linkage issue, as you mention it seems to be limp.

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83 SD

84 CD

I too am not familiar with that engine, On a 617.952 it is possible for the stop lever to not kill the engine if the course idle was adjusted to raise the RPM. If adjusted too high, adjustment will not allow enough travel of the stop lever. I adjusted my 85 idle up to about 725; would have liked to go closer to 750 for idle smoothness, but then had an issue with being able to kill the motor in the event of a vacuum failure.

Again, not sure if the 87 motor is similar to this or not.

Instead of messing with fuel, it's still much safer and cleaner to just put a wood block over the intake to stall the engine until you figure out your cut-off issue.

Phil Forrest

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1972 220D "Trudy," named by a friend.

"The 220D sounds good... I suspect it is the only car that you need a calendar for, rather than a stopwatch, when doing acceleration tests."
Tom Abrahamsson

I had the same problem with the 87 diesel when I was replacing oring on kill lever.
I assumed I can pull it out, change the oring and put it back, but the shaft did not go back into right place and did not work.
I had to pull the cover out to make proper assembly.

Sounds like something is loose / disconnected inside the governor but before you start pulling things to bits perhaps you should disconnect the accelerator linkage and then see if that makes a difference to the feeling on the stop lever.

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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!