Question about 1989 Toyota Supra

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My 1989 supra mk4 revs between 1500 and 2500 rpms when i am idling. what is wrong?

Posted by Anonymous on

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: 1987 toyota supra idles great,

throttle position sensor

Posted on Aug 15, 2008

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  • 51 Answers

SOURCE: engine doen't stay idle at steady rpms rev up and down by itself

Either you have a vacuum leak, a bad throttle body position sensor, or a bad throttle body.

If the throttle body is drive by wire (electronic) then it would be a bad throttle body.

If the throttle body is drive by cable (manually driven by a cable connected to the gas peddle) then it would be a bad throttle position sensor.

If the throttle body is bad the check engine light wil lbe on. If it is on have your codes read at your local parts dealer for free, and this will give you a clue as to which pices/parts you need to replace.

Have the car leak tested and the vacuum linse inspected for leaks as well.

Posted on Jun 01, 2009

  • 10865 Answers

SOURCE: water in headlamp Mk4 supra

If the water is inside the headlamp aka bulb itself your best option is to replace the bulb.

Posted on Oct 23, 2009

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