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fuel pressure

  1. 01-04.5 LB7 Duramax Powertrain
    Earlier today I installed a fuel pressure gauge from Glowshift to monitor my AirDog 150. I bought and installed the 8 psi spring from Vulcan Performance. My gauge reads a minimum of 12 psi while the engine is under load and about 14-15 psi while idling. Since I installed the 8 psi spring I...