| with it plugged in, and the key on. Not the connector on the front of the sensor. The one on the front of the sensor is the Hard Idle switch. You should adjust at normal operating temp, btw. But first: try turning the key on and then disconnect that grey connector (NOT the hard idle switch) for several seconds, then plug it back in. This is usually the LAST step in adjusting your TPS. It resets the idle signal so your ECU knows what closed throttle looks like. Otherwise idle races like you described. Then start your car like normal and see if the idle levels out.
If you still need to, adjusting the TPS by back probing the connector is really easy if you have a voltmeter and some pins.
Here's how: With the sensor plugged in, insert the pins into the back of the connector (the grey one hanging below, not the hard idle switch) so that the pins come into contact with the pins inside the connector. You're probing the center wire and the black ground wire. Be careful not to break the connector! Make sure your probing pins don't touch each other. Turn the key on - you don't need the engine running. Check the voltage is between .4 and .5 volts with the throttle closed. If not, then loosen the adj. bolts and gently rotate the sensor until within spec. Open throttle 100% and check that voltage is approx 4 volts. Tighten the bolts. Then disconnect that connector for a few seconds like mentioned above. Plug it back in and you're done. You can start the car and check the closed throttle voltage again to double check your work. If the voltage is within spec, but the idle is still high, (engine must be at normal operating temp) disconnect the sensor again while it's running. Wait a few seconds, and plug it back in. The idle should level out. If it does not, and the TPS voltage is withing spec, then your high idle is probably caused by something else.
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