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well you leaking gas either from your fuel pump tank float assembly inside the tankand gasket is bad that seals the fuel in or possibly a bad fuel neck aka filler tube also check your fuel lines and make sure all clamps are tight
Your 2000 Ford. only has one fuel pump, no secondary, if no fuel pump pressure, check fuse, if fuse good, check voltage at fuel pump connector, fuel pump sit in gas tank, check voltage there, will only have voltage for 3 -5 seconds, every time the key is cycle, from on to off, if you have voltage there, bad fuel pump, fuel tank will have to come off, to replace fuel pump.
The primary fuel pump is located in the left side of the tank. If you fill the tank up and it still does not start then it is the primary tank. Problem is that now you will have to drop the tank with a full tank of gas. The primary pump is used to pump the fuel to the fuel rail, while the secondary pump is used to pump fuel from the right side of the tank to the left side. I usually replace both primary and secondary so I don't have to pull the tank again if the secondary is also bad.
Are you sure you have a fuel pump problem? What are your symptoms?
Here is a list of some things that can cause it,
Emmissions system not functioning properly,
Faulty secondary ignition system
Fuel injection system in need of adjustment
Vaccum leak at fuel injectors, around intake manifold, or vaccum hoses
Clogged fuel filter
Weak fuel pump
To test for a vaccum leak, get a can of starting fluid, with the engine running, spray around the intake manifold, the vaccum hoses, connections and fittings, where ever you spray and the engine rev's up a little, you found a leak.
The mechanic should check on the leak of the gas tank and locate the leak and weld it .Then if there are leaks also in the fuel lines or hose.The fuel filter should be check also if already worn out or destroyed they should be replace .if clogged or dirty it should be cleaned. there are two fuel filters the primary filter and the secondary filter . That's why you have to do it twice , the cleaning.The clogged that happens on the fuel filter are cost of dirt that are found in the gas that have been stuck in the filters . So that the gas or fuel that will go to the engine is clean to be compressed by the engine.
there should be two straps holding the tank in place,,,,if you remove them the tank should drop down to where you can disconnect the feeder hose and go from there
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