Replaced lift pump today. The old one was totally dead. O pressure. The injector pump actually sucked in air as if under vacuum when the pressure fitting was actuated on both the before filter side and at injector pump. Is this possible. The truck has been running rough only at high rpms for probably 15 to 20,000 miles. Can it run on injector pump only for that long? It has 90,000 miles. It runs great now. Smooth all the way up through the rpm's.
How long now till my injector pump craps out from that excees stress it went through?
How long now till my injector pump craps out from that excees stress it went through?