we picked up some bad gas and took out the fuel pumps on 4 Cats . I have drained the fuel (As much as I could get out) and changed the pump but after I turn it off and let it sit the pump freezes again . I have to reverse the pump then prime it forward and it will run fine . Anyone know of any good additives I can run through to try and get the little bit of water out of the bottom of the pump that seems to be freezing on the screen in the pump .