The car is a 90 mustang gt with exhaust and headers. I installed the headers 6 months ago. I was going down the street in 3rd gear then it started missing/stuttering/bucking and it almost shut off, (the battery light flashed real quick but the car didnt die) It has started doing it more now so im going to change the plugs and wires and see if that helps. Does anyone have any idea what it could be?