My car has suddenly developed a smoky, shaky idle. I have the old style rack damper pin which I have pulled out and tested (it is marginal) which could explain the shakes, but I don't see how it could be causing the smoke. The smoke is blue-grey and is present at idle. Acceleration after idling (such as accelerating away from a stop light) causes a large plume. A few days before the smoke started I installed my air/water intercooler which required the turbo compressor housing to be rotated about 90 degrees. Other than that the only recent change was filling up with a few gallons of diesel at a new station, however those few gallons have now been diluted by B99.

What could be the cause? Turbo seals?

Thanks.

__________________
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