my 1993 chevy blazer s-10 revs up and down and back up again. what could be the problem?

  • Thread starter Thread starter dviper1987
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dviper1987

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it seems to only do it when its warm and in park. sometimes seems to do it when its in drive and i'm on the brake like at a stop sign. its not terribly noticeable but i notice even minor details. i noticed it more when i played with the throttle under the hood. also seems to sound like air running through a jet engine when i'm accelerating, up or hill more than any other time. it doesn't seem to have lost power. but i've got some ideas. i wanna know if anyone else has any ideas.
 
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