Forum Discussion
nayther
May 25, 2016Explorer
rmoore0852 wrote:nayther wrote:
I'd check that fuel line with some air for a leak. Take it loose at the tank and plug it, then put about 10 psi in it and see if it holds, check for leaks with soap bubbles. You may have a small leak somewhere else that's causing the pump to suck air. It is possible that the joint in the tank is the culprit but I'm not convinced; if it was that bad of a leak I'd think the fitting would fall off. Maybe JB weld it together?
I intend to do that also, but since it runs fine down to about a half a tank of fuel, my thinking is that is must be tank related. If it was a problem in the fuel line, wouldn't it act up no matter how much fuel was in the tank?
Maybe..........the height above the pump is part of the "net positive suction head" (NPSH) and it helps overcome the inlet line pressure loss, it's possible, up to 1/2 tank, that there's enough NPSH to negate the leak or a weak pump suction.
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