Gas pressure buildup

SOURCE: Pressure buildup in the gas

car is sputtering fells like its only running on 3 cyl check engine light is on

SOURCE: Gas overflows when fillingtank.

This sounds like the gas tank vent pipe is obstructed.

SOURCE: 1992 f-150 dual gas tanks tank closest to cab of truck pumps gas out the fuel cap

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.

SOURCE: AIR LEAK IN TOYOTA COROLLA FUEL TANK

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 .

SOURCE: expansion tank cap is leaking antifreeze from the

OK, First let's get a couple things straight.

1. NEW is spelled with an "N"
2. GOOD is spelled with a "G"
3. "NEW" and "GOOD" do not mean the same thing - if they did, we would have absolutely no use for the word "WARRANTY" I have seen many people beat their heads against the wall trying to fix a problem and cant figure it out because the part that was causing the problem was "brand new".
4. It is absolutely impossible to have it both ways. Either the cap is holding pressure very well, or it is leaking.

OK, now that I have my preaching done, I would first have to ask: Are you sure that the cap is on STRAIGHT and screwed all the way down? I have seen a few surge tanks that will actually allow a person to scew the cap on in a tilted position...flimsy plastic junk...

...ANYWAY,
Make sure that the seals in the cap are not damaged. There are two seals, the first is an O-ring that will seal the tank neck just below the overflow hose. The other is a flat seal up in the top of the cap which seals against the top of the threaded area on the surge tank. (This is the one we need to give the most attention to in your case - if the O-Ring is bad it will most likely be dumping all your coolant out the overflow hose.)

If you are satisfied that the cap seals are in good conditon, (They SHOULD look brand new! ;) ) then take a look at the surge tank.

I have seen several plastic surge tanks with "flashing" from the moulding process left on the top edge where the cap seal is supposed to seal. If there is a ridge on the upper surface that you can feel with your fingernail, it is enough to cause a leak. This can be fixed using a block and some 220 grit sandpaper. Be careful not to sand too much and/or sand it to where the top ends up angled. You may want to follow this up with some 1000 grit sandpaper to smooth it out even better.

One final note:
Make sure your surge tank is not overfilled. If it is, it will dump antifreeze untill it reaches the proper level regardless of the condition of the cap and/or surge tank.