Been having a loss in fuel pressure over the last two days. Have a fuel rail pressure gauge on pillar. Pressure will bounce 4000 to 5000 pounds driving down the road. When hooked on the pulling track the gauge drops to 5000 and i can't get turbo to spool. I already have a PPE fuel pump under the box the 150 gpm model and I think maybe the pump is getting weak. Does anyone possilby have any other ideas of what could be wrong. Coal Train this is Josh thinkin maybe an Air Dogg kit is in order