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?
http://www.4crawler.com/4x4/CheapTricks/TPS/index.shtml

Posted on Jan 06, 2011

  • slerdwerds Apr 07, 2011

    how do u adjust the tps?

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My engine revs and trys to take off while i am sitting still, the car would be in drive and my foot on the brake, It revs up and sometimes when i let off the break it surges forward then shuts down in...


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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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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This vehicle should be storing a code, take the truck to the advance auto parts store or auto zone and ask to have them hook up a code reader to it this should give you at least a general idea of where to check or replace parts. If the truck is not storing a code I would say it is either the MAF (mass air flow ) sensor or the throttle positioning sensor, but usually when the TPS (throttle position sensor) acts up you will hear a surge in the rpm's, in other words the engine speed will tend to go up then come down go up come down etc.

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