Did you fill the new filter with diesel and use the primer pump until fuel flowed out of the loosened top bolt on the secondary filter? If so tighten up the bolt on the secondary filter and crack all of the injector lines until you get fuel at each one then tighten them up.

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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