Home >> Ford Truck >> 1983 >> Ranger 2WD L4-122 2.0L SOHC >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Technical Service Bulletins >> All Technical Service Bulletins >> Emissions Diagnosis - Manual Revisions >> 4.9L Truck (Sect. 17-27; 17-28; 17-31) >> Fuel Always Rich