I have an '87 mustang with an aod and was welding on the car. I forgot to disconect the battery and i think i fried the computer. It ran ok at first, then it started to smoke and then it idled rough and before long it wouldnt even start at all. I think it must be the computer becuase it acts like it isnt getting any fuel and wont start. Does anybody know if it is simple to change to mass air. I need a new computer but i think it would be a good time to upgrade to mass are if its easy enough.