i recently changed the alternator and had to disconnect my battery. after installing the new alternator i started the car and my gas gage was below e. it is stuck under the stop that it rests on when the car is off. when i start the car it springs up to the stop so it looks like the car is always out of gas. is there a way that i can fix this problem. i am not good with math and figuring out how much gas i have by way of how many miles i went is too much calculating.