The gas gauge shows around quarter of a tank then it dies put 2 gals in it and it starts right up. people been telling me that they been putting fuel pump or level sensor in and it doesn't help.

Then it sounds like the gauge is wrong. The float for the gas tank could be sticking at that point, or there could be an electrical issue causing the signal to the gauge to be off. I would think fuel level sending unit, unless you can verify there is in fact gas in the tank when the car shuts off. If that is the case, then it may be an issue with the gas pump suction getting air at that level and not being able to pump that last bit.

guage can be off --fuel pump going ---or fuel filter clogging the check engine light usually doesn't go on for these problems

Drain the bad gas out and put good fuel in. Add some Marvel Mystery Oil on the bottle it will tell you how many oz. per gal. that should get it running good.

Map sensor is bad

Sounds like at 1/4 reading,the actual reading of the fuel should be empty.Your gauge sending unit in the tank is most likely defective.Many are on these.

its probably the gauge in the tank if they put the pump in and not moved the wiring when fitting it get court on the float so does not move, had this before, but if it been like this for a year i would remove the gauge as its not been moving about to keep the resistance board clean so would need to be cleaned up, oil spray and a cotton bud should clean it up ok with out damaging the board.

These usually have large tanks, although the guage is attached to the fuel sending unit located in the gas tank. Essentially a level in the tank that tell the guage where the level of fuel is. I would start with the sending unit, usually sold with the fuel pump.

Regards.

You probably put the sending unit in pointing the wrong way. Easy to do. When this happens the float level sits on a raised part of the tank. Only going down to around a 1/4 tank level on the gauge. It will have to be moved to work right. The gauge that is. The pump will still work weather you fix it or not.

Could be a
1. Fuse - not likely, I'd expect other instrument panel problems.
2. Broken wire from fuel gauge
3. Bad fuel sender in fuel tank. Normally requires dropping the tank.

Vehicle is not that old, would think it is still under warranty?

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.