I had the harness already replaced by Ford, CEL was on before tranny change, but dissappeared after the change was made. I had replaced both O2 sensors earlier, but was never able to clear codes using procedures listed on website. Mileage improved from 280 a tank to 340-350 after EGR cleaning and sensor replacement, but i have never gotten over 400 miles a tank ever with this car. Any code numbers to tell the difference between the 4 cylinder vs. 6 cylinder MTX?
MARK
