WD-40 when you have the frame rail filter out. Take a flash light and look in the housing and shoot the heck out of it! Then go in the drain boss with a small pick. You will be amazed at the stuff that comes out!!! You do know to use oem filters right and only oem/Racor? I also suction the fuel from the upper bowl as well and refill it with fresh fuel...b
I used a whole can of brake cleaner, you should see the brown flakes that came out if it. The water in fuel sensor has gone away. Also, the threads on the screw to let the water out has worn down considerably so will conside buying the aftermarket screw for sure
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The Diesel Stop
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A forum community dedicated to all Ford Diesel owners and enthusiasts. Come join the discussion about PowerStrokes, performance, modifications, troubleshooting, towing capacity, maintenance, and more!