Full, empty gas tank

[cycanada]

My gas tank is nutz, if i got a half tank of gas the needle is fine, and then after it gets under a quarter of a tank, the needle shoots up to show that I have a full tank of gas, also when its like that and I try to put gas into the car, it spits the gas back out at me, this is crazy any ideas what this could be?

[doubleN0alero]

fuel pump or at leat it was for me

[misslindseysue]

Mine had a little attitude problem for a while - same thing. It sorted itself out though. I just kept an eye on the trip odo and didn't trust the gauge. But yeah, it's most likely the pump or sending unit that's attached.

[jackal2000]

the needle on my car was jumping around one day so i jerked the steering wheel back and forth a couple times to unstick the float in the gas tank which fixed the problem for me.

[Redog]

Yeah it's the float

[olds03alero]

its the sending unit. if you get a gm one its a pump/sending unit all in one

[sound_xtreme]

mine was bad from the day i bought the car. i just learned to count miles until i moved down here, i changed the pump before i left. you cant buy just the sending unit. you have to replace the whole pump

[Gr1m]

i just replaced my pump like 2 months ago and its still facked up

[TheEdgeofSanity]

um, mine occasionally will drop to empty even when its full. i have to shut off my car and turn it back on then its all fine. would this be the gas pump?