Explor and Goose are right on. You need to test the sensor with the digital ohm meter. What you want to do is unhook the sensor, measure the resistance while watching the meter and slowly opening the throttle plate. The reading should go up and down smoothly. It should never go both ways while opening the throttle. The other thing is having the correct voltage for idle position. If the sensor passes the test, check for damaged wires and connectors. I guess I didn't know Auto Zone had "techs". I further don't understand how anybody could fry wiring clearing codes. Seeing as all that is involved is issueing a command with a scan tool, I say it is impossible to damage any wiring. The only way I can think of damaging wiring is if some idiot got to cutting and splicing, or the vehicle in question already had serious problems to start with.
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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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