5.0L Tech
ok so i have a bad surging idle so i pulled some codes here you go
66 - , MAF signal below minimum test voltage of .4vdc (O,M,R), Temperature Circuit Grounded (M,O)
21 - Engine Coolant Temperature, ECT Sensor Out Of Self Test Range. 0.3 volts (250°F) to 3.7 volts (50°F)(O,R)
18 - Spark Out...