My 83 300cd will not shut off with the key.
I have checked the lines at the ign. switch, if I pull vac. on the line to the ip it shuts off, the supply line gets 4# off the engine, if I pull vac. on the supply line in the engine bay it will shut down with the key if I keep pumping till I quits. There are no leaks it will hold 10# for 15 min.