Compression Ignition Addict
Join Date: Jun 2012
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Trying to find air leak in fuel line
I have a leak somewhere in the lines from the tank to the fuel bowl. No diesel is ending up in the valley of the engine, but the fuel bowl is emptying. The lift pump has already been replaced, but the problem persists.
I'm planning on isolating each section of the fuel line and trying a vacuum pump on it to see if I can find the leak by seeing in what section the gauge reads a loss of vacuum. Will I do damage to the injectors/fuel rail if I hook it up straight to the lines while still connected to the fuel bowl? The lines are braided and everything, but my vacuum pump is a decent sized one, like 1/3 or 1/2 horse. My thinking is that it should be fine, but I'm not positive. I was going to start from the rear tank and move forward....
1996 F250 eclb, 4x4, 7.3L PS
425,000 mi and counting
Viair 444C/6g air tank on frame, Hadley air horn, Hella auxiliary reverse light, DIY WVO conversion; Efuel, dual FuelLab FPR's, 90g RDS tank, aluminum tube-in-heater hose, hotfox heated fuel pickup, copper coil-wrapped filter, 40-plate FPHE, auxiliary coolant pump, 2000lb winch-crane bolted to the frame. Ranch hand front bumper. Big winch.