The only sure way to repair this is to replace both fuel pump modules with high quality (preferably OE) assemblies at the same time. After the late 80's, Ford stopped using a valve to switch between tanks. Instead, when a module is energized, the dormant module keeps from receiving fuel through a valve. If the module is energized, fuel is allowed to return. However, if the module is not supplying fuel, it is not supposed to receiving any returning fuel.
The problem occurs when only one module gets replaced. This overwhelms the older (and often faulty) module. Thus the new pump starts pushing fuel into the older module as well as the truck.
my friend has one of these.it had the same problem,which a lot of them did/does.Ford did recall these but i assume it won't cover yours because you would had to taken it in before a certain year and mileage,BUT i would still call them,won't hurt to try!>>>Ford has recalled 1990-1993 F150, F250, and F350 trucks due to a faulty fuel pressure regulator and malfunctioning fuel pump check valves. Fuel may transfer from one tank to the second tank, causing a possible overflow condition and fire hazard. Dealers will replace the fuel pressure regulator and install redundant check valves...>>Ford has extended the warranty coverage of the fuel pump and sending unit assembly in 1990-1993 F150, F250, and F350 trucks. In some trucks, the check valve may become damaged inside the fuel pump unit. This can cause fuel to travel from one tank to the other, creating an overflow condition. In the presence of an ignition source, a fuel leak may result in a fire. Dealers will repair the fuel pump and sending unit for up to 12 years or 150,000 miles from the original warranty start date.>>THIS IS NOT A SAFETY RECALL IN ACCORDANCE WITH THE SAFETY ACT. HOWEVER, IT IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN BY THE AGENCY. VEHICLE DESCRIPTION: 1990-1993 FORD F-SERIES VEHICLES EQUIPPED WITH DUAL FUEL TANKS AND 4.9, 5.0,5.8, OR 7.5 LITER GASOLINE FUELED ENGINES. SOME VEHICLES CAN EXPERIENCE A CROSS TANK FUEL FLOW CONDITION DUE TO A DAMAGED CHECK VALVE IN THE FUEL PUMP/SENDER ASSEMBLY. FUEL MAY BE SUPPLIED FROM ONE TANK AND SOME OR ALL OF THE UNUSED FUEL MAY BE RETURNED TO THE OTHER TANK.>>Remedy:
FORD IS EXTENDING THE WARRANTY FOR POTENTIAL FUEL CROSS-FLOW TO 12 YEARS OF SERVICE OR 150,000 MILES FROM THE VEHICLE'S WARRANTY START DATE, WHICHEVER OCCURS FIRST. THIS COVER WILL AUTOMATICALLY TRANSFER TO SUBSEQUENT OWNERS AT NO CHARGE. IF A VEHICLE ALREADY HAS MORE THAN 150,000 MILES, THIS OVERAGE WILL LAST UNTIL DECEMBER 31, 2001. IF THE VEHICLE IS EXPERIENCING A FUEL CROSS-FLOW CONDITION, DEALERS WILL REPAIR THE CONDITION FREE OF CHARGE.
Notes:
FORD HAS DECIDED TO CONDUCT AN EXTENDED COVERAGE PROGRAM TO EXTEND THE WARRANTY COVERAGE FOR POTENTIAL FUEL CROSS FLOW PROBLEMS. OWNERS CAN CONTACT FORD AT 1-866-436-7332, CONCERNING THIS PROGRAM.
National Highway Traffic Safety Administration logo
Recall data provided by the National Highway Traffic Safety Administration
