I have a 88 rx-7 and when i am accelerating i have no problem with my get up. when i plato and arent accelerating or decelerating it acts like my car isnt getting enough fuel and it hesitates. also when i fill up my car there is a huge vacuume and it scares the shiz out of me when i take the cap off. waht is wrong with it.

 

Last tuneup was when? Fuel filter was last changed when?