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 - Tuning-Up Your Tractor: Secondary Ignition Wires and Distributor - by Curtis Von Fange. In our last episode we spent the entire day checking out the spark plugs. Is that efficency? Actually, it took more time to explain than it really did to do the inspection. At any rate we decided that a compression test was in order so we could verify the internal engine status. That way we wouldn't buy any tune up parts until we were sure that the engine was in reasonable mechanical condition. Our tests showed a fictional compression reading of 85, 80, 82 and 86 psi. That is well within a
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