Question about Cars & Trucks
What kind of vehicle is this? You need to supply more details if you want assistance.
Posted on Apr 29, 2014
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Posted on Jan 02, 2017
SOURCE: Ford F100 Fuel System
There are a couple things here. In the first place if you can pump fuel with the pump off the engine and pumped by hand doesn't mean that it will pump on the engine. See the stroke on the engine is very short, it only moves like 1/4 inch. So you could have a bad pump even though you are pumping by hand. The gas cap, will have no effect on this model. Yes the pick-up tube has a filter on the bottom of it, and it could be stopped up. You can remove this unit up through the top of the tank, got to wiggle it and turn it sideways, and if you can find a used one( New ones scarce and expensive) by going to used parts place, and look for 1967 - 1972, they are all alike. Lots a luck in fixing this great ole truck.
Posted on Aug 12, 2008
There is a vent valve located near the fuel tank. The vent valve is part of the EVAP emission system. If the valve is obstructed or failed, air will not escape while refueling.
Has the service engine light come on at all?
Posted on Jul 14, 2009
A FORD EQUIPED WITH DUAL TANKS THIS YEAR MODEL HAS CHECK VALVES IN THE FUEL PUMPS .THE FUEL RUNS FROM THE REAR TANK WHEN IT IS POWERED ON TO A TEE AND INTO THE SAME LINE AS THE FRONT PUMP . THE PROBLEM IS AT THE BOTTOM OF THE FRONT FUEL PUMP THERE IS A CHECK VALVE ON THE FOOT AND IT IS NOT WORKING.WHILE THE TRUCK IS RUNNING WITH THE REAR FUEL PUMP ON IT IS PUMPING FUEL INTO THE FRONT TANK . IT WILL RUN OUT OF THE NECK WHEN IT IS FULL.THE FIX IS SIMPLE REPLACE THE FRONT FUEL PUMP. THEY DONT MAKE A CHECK VALVE REPLACEMENT I CHECKED I HAD THE SAME PROBLEM AS YOU.
Posted on Oct 13, 2009
you'r EVAP system is not purging the system . I suspect it is your charcoal canister located in the left side of the engine compartment located near the master cylinder its a piece of cake to change it just slides up after you diconect the lines .
Posted on Oct 27, 2009
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