whats wrong with my 89 honda prelude?

  • Thread starter Thread starter NABEELiOS
  • Start date Start date
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NABEELiOS

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my 1989 honda prelude is always revving up and down. The RPM gauge goes from 1 to 2 constantly (about ever 2 seconds).
I talked to a mechanic and they said it has something to do with the sensors. But they did not see it yet. Can someone help me?
 
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