What would cause a fuel gauge to drop down to empty with 1/2 a tank? Recently the gauge in my DA has been dropping to E then when I stop it slowly creeps back up, bounces around for a second then drops again. When the tank is full it isn't as noticable, but as soon as I reach half way... down it goes. TIA

 

maybe a faulty sending unit

 

Thanks, I'm gonna pull it out this weekend.