I recently bought a 2000 mustang saleen. Originally the car was not supercharged. The person I bought it from installed a supercharger ,new fuel pump and intercooler. The car runs great but there are times when I go to start the car it does not want to start. The only way it will start is if i hold the gas down all the way to the floor.This does not happen all the time. The person i bought this from said he had to put 2 fuel pumps on the car . I don't think it is a fuel pump issue. Can anyone give me an idea of what could be happening with this problem?