Just gravity sucking back down towards the tank. Replace all the rubber hoses and clamps from the filter to the fuel bowl to keep air from getting into the system and allowing it to drain back. It still will over time, but it is not right to do that quickly if there is no leaks to allow air in.
Craig

Last edited by denfireguy; 06/01/14 06:58 PM.

2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado