Just checking...somebody had a similar problem after running WVO from the main tank.

The Italian tune up is simple. Just drive the car hard. It will blow out all of the carbon and crud that has been accumulating. A search on "Italian tune up" will provide more information than you can shake a stick at.

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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