well reason being is motor in exp blew up, so i took motor out of a 89 foxbody and put back in the exp, but i havent had any luck getting it to run right. when you start it its super hard to start and when it finaly does start u have to keep pumpin gas (like on a carb).when you unplug the maf it starts alot easier but you still have to pump it,,, ive checked everything pump filter,reg,new maf, getting fire. you name it ive done it that i can think of,,,also no codes coming up...buddy told me he thought he read somwhere that thecam in the exp was diff then th stang so before i tear it apart and try it id like some more input ...