ok so i went to the gas station and filled up my tank, i turn my car back on the gauge falls to below E and wont go back up?

but when im driving up a hill or something with wot in like 4th it will start to go back up, then all the way down when i let off..

but if i go super slow and lock up my breaks and slide (cause its raining) it will go back to normal, but when i start to move again it goes back down past E...

never happened before so im not sure if its the sending unit or what.. any ideas?

 

Check your sending unit which it sounds like, or your gauge sending unit sensor which is located in the head. Single wire sensor!

 

what should i be checking for?

 

If your going to check your sending unit, you need to check the resistance or ohms.