Johnny89345
OBS Enthusiast
Im new to diesel. I cab swapped my 89 c1500 for an 89 k3500 gmc with a 6.2 diesel. The truck has 80k miles on it. Now it starts right up and idles fine but has 0 power, less then my 305tbi. Sometimes on the highway i hit the throttle and nothing happens just starts to miss and stumble. So i changed the fuel filter and removed the bleeder screw above the housing and it vled the air within a few seconds which leads me to believe the lift pump isnt bad. Whats next?