bounces around... it can be on full, i look up, and when i look back down it's at half, seems to move around freely, but gives a general idea of how much gas is there... what could this be? fixes? thanks

 

what year??

 

91 Z28

 

lol i dont think that the year really matters. this usually happens when your "top'er off" you just gotta fix the thing in the tank i think, never had the problem, but ive had friends talk about it before.
oh and on the notion ive got a problem, my tank when close to about 1/4th a lil less, my tank is empty, any ideas on that>???

 

It should stay relatively still and give an accurate reading when idle. I know mine jumps all over the place (From empty to full quickly) unless cruising at one speed and on a smooth road or idling and still. Though I have a Sport Coupe with a gas gauge where the tach should be.

I've also found out that you will suddenly have more gas if you're turning right.