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Each injector pump mates a rack, that connects each injector pump to the governor. They have timing marks on each pump and on the rack that has to match. All have to be on the same mark, or one will send too much or too little fuel to the injector nozzle. Rack will be in no fuel position with engine off and moves to run position when the fuel solenoid moves when key is turned on. To bleed the lines, just loosen the line at each injector nozzle and crank until fuel squirts out, not just dribbling.