I'll keep that in mind. I had to put the project on hold for a week or so and leave town. The car is actually at family's house in Vancouver WA, and I had to come back home to Pullman. I'll have another go at it in a few days. I'm not too hopeful that I will find the problem, but pulling the vacuum pump is worth a shot. Now I just have to figure out which car to sell. I have too many cars.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine