Larry,
I'll side with Brian here. Before tearing out the engine shutoff device,
test it by applying vacuum directly to the device to see if it shuts
down immediately. It should. Usually, the engine shutoff device is not
the problem. Like the rest of us here and there, you most like have a
vacuum leak somewhere, that is causing it not to shut off. How are the
door locks working? (do you lock the doors when you drive? try shutting
down with the doors locked) the fuel door and trunk locks, AC pods in
the dash, directing air flow, etc? Also, around the oil filter area,
tubes get knocked off, and mess up the vacuum. The vacuum line
connectors can also wear out after all these years. Occasionally, the
vacuum valve at the key gets messed up, though this is again rare.
If you don't already have a hand vacuum pump, buy one. You'll need it
again.:)
Harbor Freight has one...or your FLAP.
Rob
'85 300D
Garden Grove, CA
> __________________________________________________________
> 2a. Re: Shutdown intermittent for "83 300SD
> Posted by: "Larry" dittmer.larry@yahoo.com dittmer.larry
> Date: Fri Jan 7, 2011 3:13 pm ((PST))
>
> Thanks, Brian. My 300SD started shutting down OK for no apparent reason. It takes about 5 seconds for a short run and 30 seconds after a run at normal coolant temp and 70 mph. The seems normal for my Cummins. I don't know what is normal for a 300SD. This is all for low altitude. High altitude takes a longer cooldown in the Cummins.
>
> However, the transmission doesn't shift right, so I suspect that there is a vacuum problem.
>
> Larry
>
>
>
> --- In diesel_mercedes@yahoogroups.com, BStromsoe<bstromsoe@...> wrote:
>> Well Larry - I have one 300D that shuts down immediately, and I have one 300D
>> that shuts down less than immediately (2 seconds in cold weather, and 30 seconds
>> in warm weather). I am going to tackle the door vacuum lines first as I have
>> issues there. I'll go for the fuel shut off last as I don't think that is my
>> primary culprit. There are several on line "how to fix fuel shut off" problems,
>> try Mercedes Source and Diesel Giant videos and pictorial walk throughs.
>>
>> brian from la verne, ca
>>
>>
>>
>>
>> ________________________________
>> From: Larry<dittmer.larry@...>
>> To: diesel_mercedes@yahoogroups.com
>> Sent: Sat, December 25, 2010 9:55:52 AM
>> Subject: [diesel_mercedes] Shutdown intermittent for "83 300SD
>>
>>
>> My "83 300SD won't shutdown after a drive at highway speeds. The shutdown
>> occurs after a half minute or so when the driving has been slow. I'm getting
>> the key release clunk and the steering wheel lockup, but I need to open the hood
>> and do the manual shutdown after>10 minutes of cooldown idle. Has anyone
>> installed a fuel cutoff solenoid, or is this a simple adjustment if you know
>> how?
>>
>> Larry
>>
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