Q: Why does my car idle out of control?

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My Integra has been idling recently from 850 rpm to close to 2000 rpm back and forth once the car slows down. If I disconnect and reconnect the sensor (tps) it starts to regulate the rpm but after a while it goes back to idling up and down. What is wrong with the car?

My car has 190000 miles.
My car has a manual transmission.

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