As we speak I'm cleaning the throttle body, IAC, and egr port. The TSB I read said not to clean the IAC with carb cleaner but to use the special super duper cleaner Ford provides (is this intake manifold spray cleaner?). Is this relevant or just clever, aggressive marketing to saps like me who...

I own an '88 F250, 5.8L; my good friend owns an '89 F150, 5.8L with the same symptoms so I'm looking for a two-for-one solution. Both idle very high cold and run poorly until mid throttle. No hesitation on acceleration nor stumble. TSP? or Idle Solenoid? Both guzzle fuel. Ideas from my new...