300td not shutting off...I've checked other threads...

[johnrf]

I recently acquired a 1984 300td for a song ($500). The car is in much better shape than my previous ones (1981 300d / 1983 240d), but it does have a few issues. The one I'm dealing with now is the typical not shutting off when the key is off. Previous owner said the vacuum pump works, and is pulling plenty of vacuum (I haven't checked this yet) All the hoses look good, connectors look new, its obvious some attention has been given to the system. On my 240d, a golf tee was in the line going to the door locks I believe, must have been a leak there because with the tee removed, the car wouldn't shut off. Put the tee in and the car cut right off. I tried putting tees in various lines, climate control, door locks etc...and nothing would kill the motor. Couldn't find my vacuum pump/guage, so I bought a new one, hooked it up to the fuel shutoff valve and after 2 pumps, the car shut off. So, for now because I really need the car to shut off without popping the hood, I have run vacuum line from the shutoff valve through the firewall where I can hook the pump to it and shut the motor off. Having said all of that, when I apply vacuum to the valve, after it shuts off I notice some red, oily liquid in the tube. Its not diesel, (Im not running off road diesel), it looks like transmission fluid. There was also some of this residue on the back side of the ignition switch when I checked it to see if the hoses were connected there. Anybody else have this happen, or know what this could be??