Fuel leek
Track the fuel leak by running your fingers along the fuel line, following from the primary fuel filter (water separator), to the pump, to the next fuel filter (attached to the engine, at least in my case), to the compression pump, then through the pressure lines, and into the injectors.If the leak is BEFORE the fuel pump, there is potential that air can be sucked into your line. This is because the pump is 'sucking' the fuel from the tank...this sucking action can draw air from anywhere there's a leak in the line. It doesn't take much air to prevent your engine from running... After finding the source of the leak, and repairing it. Make sure you bleed the line of air.Cheers!-j-