2001 Pontiac Firebird Gas float

The float on the sender unit is going bad. Will need to replace the fuel pump assembly.

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it will help if you tell us what kind of car it is and dose this problem happen after you fill it while the car is running or is it off ?

Or bad float !!

I think its time to change your sending unit in the tank,not sending a signal to the gauge

If gauge still shows empty and light is on then inside tank there is a arm thats prob just stuck remove lower rear seat and will see entry to tank gauge has about 3 to 4 screws open and check if arm is down or floating .

You have most likely sucked residue in the bottom of the fuel tank into your fuel filter, This can cause it to get blocked, Try fitting a replacement fuel filter as it's most likely it's never been changed anyway.

very common. The sender in the gas tank is the problem.
It will need to be replaced some day
Both my gas tanks do the same thing in my F250. 1 tank stays full all the time and the other drops from full to about a half tank when I get to half a tank and then works so so till empty.

it is one of two things the fuel gauge in the tank is bad or the gauge in the dash is bad...I would check with the dealer to see if they have seen that problem before...they maybe a recall for that problem...

There is a float in your gas tank that raises up and down. When you fill your car with gas it will move up, when your burning gas it will go down. So if your fuel gauge is stuck then your float in your tank is stuck and you won't know how much gas you have. To fix this you will have to remove the tank to fix the float. Hope this helps.

Hi, sounds like you have checked everything properly and you have a bad tank sender, current when checked with test lamp should pulsate.I suggest replace fuel tank sender.