Fuel With a 1/2 tank of gas, gas pumps shuts off after 2 gallons

SOUNDS TO ME LIKE FUEL PUMP AT GAS STATION IS FLOWING FAST AND FUEL ISANT GETTING INTO THE TANK FAST ENOUGH SO THE PUMP SHUTS OFF TO PREVENT SPILLAGE

Put at least 5 gallons of gas in the tank. Most tank baffles won't let 1 or 2 gallons get to the pump.
Before you do that, go back and make sure everything is hooked up, and no rotten rubber lines at tank and evap connections. If you didn't already, change the fuel filter.

With the information you've provided, one cam only imagine that you are obviously over filling the tank.

So this leads me to suspect that maybe (just maybe) your gas gauge is saying you are on empty, or 1/4 tank or a 1/2 tank whatever, etc. And you are wanting to make sure it is full.

I presume it always says this and that perhaps you need to have the sending unit replaced inside your fuel tank.

Otherwise, if all things are in working order and you meant to say that the Pump Nozle that the service station uses (where you fuel up) is not shutting off when your tank is full.

One of two things are happening,

In the case of a pump handle that has an auto lever, either they have a faulty pump nozle, in which case you need to talk with them about this.

OR

It is a manual Nozle, in which case you are holding the lever personally and are over filling your tank...

It would be advisable to look up the total fuel capacity of your tank and make a note of approximately how many gallon are in it before fueling up.

This way, if you know there are say around 5 gallons and you have an 15 gallon tank.
Adding even 10 gallons you would be running the risk of over flowing since you are only estimating say 5 gallons at the beginning, maybe it is 5 1/2 or even closer to 6. Therefore only about 9 gallons could be added without over flowing...

Hopefully you'll have found something useful in this.

Good Luck and happy motoring

Respectfully

sounds like the fuel guage is listing one way or the other...
I would suggest keeping more than 1/2 a tank of fuel in the tank at all times... in order to maintain a properly cooled fuel pump it must be submersed in fuel...

I have observed this condition just recently. There is a flap in the neck of the tank (not on the filler tube) that prevents fuel froim draining outof the tank in the event of a roll-over condition. The only way to rectify this is to replace the fuel tank.

fuel pump is going weak

does your car run fine on the 5 gallons you stick in each time? if so I would say that your fuel pump is ok. I would take the tank out and see if there is some obstruction in the fill tube and tank orface, also look inside the tank for any floating debris, check and or replace the tank vent

If the fuel gauge drops off when you are driving then its a sending unit problem that means you have to drop the tank and replace the float and sending unit. This is a common problem for alot of cars because of cheap gas. If you have to drop the tank check the fuel pump canster for dirt because of cheap gas. Replace the fuel pump strainer and fuel pump filter. If the car or truck has about 100,000 miles you might want to change the fuel pump at that time also just to cover your back. If you take it to a shop they will charge you at least $900 to start. But if you do it yourself it will cost you about $200 dollars maybe alittle more.

the fuel pump boot is full of debree off the bottom of the tank. two ways to fix the prob. 1 dont run it out of gas anymore, or 2 drop the fuel tank and clean it out

I had a similar problem only I was lucky enough that my gas gauge started working after it got lower than a 1/2 tank. It ended up being the float inside the tank. I ended up paying around $90 for the fuel float and it started reading the gas level correctly. But after 2 weeks and some severe cold weather, my engine wouldn't recieve any gas, ended up being the fuel pump. In buying the new fuel pump, along came a new float attached. So if your planning on replacing the float, go ahead and replace the whole pump, it will save you time, money, and hassle after its all over with.