You need to replace the braided bypass lines and check all injector connections...leaks are not good and should repaired. I would also change the fuel filters. Maybe you have some crap in your fuel tank or the pick-up in the tank has a problem.

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1983 300SD 343K everyday car
1983 300SD 285K from junk yard-tooks parts from deer car- runs great. Brothers car.
1984 300SD parts car-Hit deer
1979 300D 175K non-turbo "Doctor"
1979 300d parts car