I drained around 5 gallons of water from the tank before it switched to diesel. Customer assumed he was sabotaged but didnt know why or how. But then called back and said he drilled 1 hole wrong for his bed floor mounted toolbox. So i checked, and sure enough, a big hole drilled right thru the fuel tank. Patched it up with fuel tank putty without removing tank because everything is so rusty i know it will be a disaster.
Fast forward a week and a half tank of fuel burned and its back running at max rail psi and setting a P0090.