I have a 96 cobra with a vortech v1, a 255 lph pump, and a vortech fmu. it was running fine all the way to 6800, untill about two weeks ago. now it sort of hesitates at about 6200. I am running 10-12 lbs of boost, but when it didnt hesitate, itd run up to15 at 6800. my air fuel guage is all the...