I have a 95 that I recently purchased,,, am getting to know it and its quirks,,, i've read a few theads about the gas gauge not being accurate,,, my issue is this... my gauge shows half full,,, went to gas station to fill it and it would only take a dollar,,, when I drive it the needle is all over the place,,, not quite like a tach but one minute it says half, the next it says empty,,,is there history as to which piece causes this??? is the filler neck and tank in a position that would allow a 'dip stick' to manually check the level.... thanks in advance