1976 w115 300d Won't Shut Off At Key
#1
Junior Member
Thread Starter
1976 w115 300d Won't Shut Off At Key
I have just bought a 1976 W115 300d. From what I have been told this is fairly rare. I have many vacuum leaks, problems, etc. But the main one is the ignition switch. The car will not turn off, luckily there is the stop lever under the hood. The fuel cut off valve is working fine, but i am not getting any vacuum. (Vacuum pump works o.k.)
Is there any diagrams, for vacuum for this car?
Or any one have a guess where to look for the problem?
Thanks!
Is there any diagrams, for vacuum for this car?
Or any one have a guess where to look for the problem?
Thanks!
#2
Sorry about the crowded spacing; can't seem to find away to space them.You can test the Vacuum Shutoff Valve on the Fuel Injection Pump by getting a section of Vacuum Hose and connecting that to the Fuel Injection Pump Shutoff Valve.Oil comes out of the old hose it is an indication that your Vacuum Shutoff Valve may have a hole in the diaphragm.While the Engine is running use a hand held Vacuum Tester Pump or simply suck on the end of the newly installed Hose. If you Engine shuts off the Vacuum Valve on the Fuel Injection Pump is OK.There is also another Vacuum Valve on the Steering Wheel lock. That can go bad and the Hoses can also go bad there.Leaks in other parts of your Vacuum System can cause the Shutoff not to work. When you get that Vacuum Diagram you can by pass the other systems by removing and plugging off both ends of the Vacuum lines that go to them.If you are also having to use excessive pressure on your Brakes it could be an indication that your Vacuum Pump is not supplying enough Vacuum. But, check for system leaks first.
Last edited by Outre; 08-12-2010 at 05:30 PM.
#3
Junior Member
Thread Starter
Allright, I have tested the shut off valve, it works fine. Now thinking about it ,it does make since about all of my vacuum leaks,there are many,many leaks...
Could you send me that link again, diagram etc. It said image not found.
Thanks!
Could you send me that link again, diagram etc. It said image not found.
Thanks!
#6
Junior Member
Thread Starter
Its been a little since my last post. I found the problem, after going over everything. The problem was on the vacuum side of the ignition switch. It was leaking air.at that vacuum switch.
So for the mean time I installed a brass cut off fitting under the steering column. Works great.
Thanks for all the help!
So for the mean time I installed a brass cut off fitting under the steering column. Works great.
Thanks for all the help!
#7
Junior Member
Thread Starter
The valve I made worked great, but kinda got in the way.. I went on a search of what I needed to do. I found out that there is a vacuum lock valve -on the steering switch. It works great, a very easy fix. The proper name is
Vacuum Lock Valve
AutoHausAz carry's these.
Part #
0004600284
http://www.autohausaz.com/search/pro...Vacuum%20Valve
Vacuum Lock Valve
AutoHausAz carry's these.
Part #
0004600284
http://www.autohausaz.com/search/pro...Vacuum%20Valve