Re: 1998 E-350 Idle Air Code P0505
Basically you need fuel, spark and air to run your engine. You're looking at one of 3 possible problems. What is the driveability like? Do you encounter any time a non-smooth throttle response? obtw check all the connections and wiring to your IAC motor as that is most suspect. Clean and inspect the connections closely for damage and/or dirt. You didn't wash the engine did you?
02 F-150 FX4 w/Baer rotors,carbon kevlar pads,SS lines,remote coolers/filters. IAS shocks,LiveWire tuned by me.