Hi All,
I'm trying to track down an air intrusion problem, and I think I have it narrowed down to pre-lift pump. The truck starts right up, but then stumbles for maybe 20-30 seconds before it smooths out. I have a section of clear hose installed on the inlet of the lift pump. When I first start up after the truck has been sitting for awhile, I get air bubbles through the hose which clear up eventually. I'm also getting bubbles whenever I switch between tanks. Both tanks are full, so I don't think it's pulling air from the tanks. Is my selection valve shot? I don't see any signs of fuel leakage on the valve or the connections to it. What else should I be checking? Thanks!
I'm trying to track down an air intrusion problem, and I think I have it narrowed down to pre-lift pump. The truck starts right up, but then stumbles for maybe 20-30 seconds before it smooths out. I have a section of clear hose installed on the inlet of the lift pump. When I first start up after the truck has been sitting for awhile, I get air bubbles through the hose which clear up eventually. I'm also getting bubbles whenever I switch between tanks. Both tanks are full, so I don't think it's pulling air from the tanks. Is my selection valve shot? I don't see any signs of fuel leakage on the valve or the connections to it. What else should I be checking? Thanks!