Question about 1994 Toyota Pickup

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Replaced the tps on my 1993 toy pu now my engine is revving up and down?

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Did you adjust the TPS before installing? 22RE?

Posted on Jan 06, 2011

  • slerdwerds Apr 07, 2011

    how do u adjust the tps?



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Revving up and down

Faulty idle air control valve.After you replace it you will need to reset the computer by disconnecting the ground cable on the battery for 30 seconds then re-install it and start it up it should run fine.

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TPS wears in spots and can cause intermittent problems like you described. Try turning off the car and unpluging the TPS. Start the car and see if smooths out the idle/reving problem while the TPS is unplugged. If yes replace the TPS.

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The idling may be a loose connection to the "idle air control valve". if the control valve connection is secure, then it could also be a bad Throttle Positioning Sensor (TPS). To test the TPS, tap it with a screwdriver while the engine is self-revving, and see if the reving changes when tapped. if its not the TPS, then try cleaning the throttle body.


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Hi, if the problem is at idle, it may be caused by a clogged PCV system. The idle controller needs the PCV flow to maintain a steady idle. Remove the PCV valve and hose and clean them with carb cleaner until you can get a good flow thru the system. Please let me know if you have questions, and thanks for using FixYa.

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Get ready to replace the TPS (throttle position sensor).

TPS will act up is it wet or

one of more wire(s) are ground to the frame/engine.

Disconnect,clean and reconnect the TPS sensor.
Disconnect the battery for 4 minutes then reconnect.
Let the computer ECU re-learn the value of the resistance reading.

Is you throttle tension OK when it happen.

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