Question about 1989 Toyota Pickup SR5

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Truck Idles weird?

I have a 89 Toyota pickup,3.0v6, 4x4.. And when it is in the idle position it revs up and down? When it is engaged into a forward or rev. motion it's as smooth as can be? Can't figure it out...

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  • Anonymous Jan 02, 2009

    I had the Toyota pickup that reved funny.. I actually just put on a new throttle body.. reving still the same

  • KC22 Jan 09, 2009

    Need a diagram of inside of Idle Air Control Motor on 1989 Toyota SR5. Have same problem with idle.

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  • 1,861 Answers

I would guess that a dirty throttle plate is your problem. If the throttle plate is not closing properly, the Throttle Position Sensor is not fully closed, with does not activate the "closed throttle switch". Remove the air tube from the intake manifold; and observe the throttle plate. if it is real dirty with black carbon build-up, this is your problem. Spray it with carb claners until it is nice and shiny.
Thanks for choosing FixYa for assistance.

Posted on Dec 31, 2008

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