Gas Guage The gas guage on my 1988 Suzuki Samurai reads full when I fill the tank, then after only 35 miles it reads only !/2 full, what is the cure for this?

THIS MEAN YOU NEED TO CHECK THE LEVEL SENSOR INSIDE THE GAS TANK MAYBE GIVES WRONG READING

I would guess you will have to replace the sending unit in the tank. A mechanic can check the sending unit with a meter and find out if the sending unit is faulty or the gauge on the dash.

Check your fuse , check the wires to the gas tank , could be the mechanism inside the tank , if you cant get it working use your trip meter as a gas gauge so you don't run out , just reset it when you fill your tank and refill before a set # of miles , lets say 200 miles , just fill the tank and reset the trip meter , just remember to fill the tank full and reset to 000 every time so you wont run out of gas

A loose connection on the sending unit could cause the problem but also moisture in the tank in cold weather could also be a factor in which i would add fuel line antifreeze to a full tank of fuel..........Hope this helps you out.

sounds like fuel pump is good the floater may need replacing or the wire that reads the floater may be loose

I have a1987 F-150. The gas gauge for the rear tank always indicate that the tank is full when I know it is not. I try to put gas in but the tank won't let any gas in. Is there some type of sensors inside the tank that won't allow the tank to be filled or is this a guage problem?

Most likely problem is a faulty sending unit. Bad news... it's inside the gas tank.

Your sending unit inside of the fuel tank is probably faulty. Unfortunately you have to drop the tank to change it.

U are going to have to replace the fuel guage sending unit in the fuel tank, there is no other part that will cause this problem

The most likely culprit is the sending unit in the tank. They are relatively easy to change, as long as you don't have much fuel in the tank. It's a mechanical unit that has a float that raises and lowers with the fuel level, however with age, the floats can develop leaks and no longer float, of the electronic portion of the unit can go bad and not register the proper level. They are replaced and an entire unit, so it doesn't matter which happened, you will need to change the fuel tank sending unit.