[Hot Wheels]

I swapped the stock PCM back into my 2003 and left the S1 injectors in place. I drove the car about 300-350 miles before the OBDII plug-in test (engine was not started). The car passed. I drove the car another 400-500 miles with the stock PCM. At that point I started getting mid to high rpm hesitation/miss and discovered that the plugs were fouled. I changed plugs to the NGK V-Power LZTR5A-13, stock number 4306. These fouled, too. I finally reinstalled the S1 PCM and cleaned the plugs. I haven't had any problems since switching back to the S1 PCM.