Should not clean the throttle bodies on Fords. Ever. They are designed to not need cleaning. They are sealed around the edges with a special sealer that reseals every time the throttle is closed. Air for idle is provided by a calibrated orifice near the center of the throttle plate. The system is designed this way to be able to tolerate buildups of deposits in the airstream. Disturbing it by cleaning usually results in permanently damaging the throttle body. Poor idling, racing unpredictably, and surging are the usual results of cleaning those throttle bodies.
This was all explained to me by Ford employees at the Ford training school in Mt. Laurel, NJ years ago when that system was introduced.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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