300D Turbo '87 Vacuum Shut Off

[reyndiesel]

I'm new to this forum. I just bought an '87 300D Turbo, W124, OM603, a 6Cyl, with 277,000mi. It wouldn't shut off and held vacuum back to the ignition with a Mityvac so I got a vacuum shut off valve from ********AZ. The problem is, I'm stuck. I can get the two bolts and brackets that hold the vacuum shut off valve out, but I can't get the, I think its the fuel rack position sensor switch, loose. Its an electrical coupling, three wires going into it a little behind the vaccum valve and in front of the ALDA. Any ideas? By the way, this is my first diesel and first Mercedes and I really like the car. Its really tight, when you shut the door there's no tinny echo like on lots of cars.