Bleed screws on side of injector pump (if Bosch). One for each injector pipe. Also make sure rubber washer/O-ring is in place between glass bowl and metal housing on pre-filter/water separator. If missing air will enter continuously and can't be bled.
have you renewed all filter seals correctly if so and they bled-up ok try slackening injector pipes and turn engine over till fuel appears then tighten up and it should run.
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