my 2000 dodge caravan 3.0 l v6 has rev-ing problem?

  • Thread starter Thread starter William W
  • Start date Start date
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William W

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i noticed this today when i turned the heat on and it was on the defroster front windshield and just a tap on the gas pedal it revs up for about 2 or 3 seconds and it wasnt like that before but when i change that knob thing to the floor section and those other ones it doesnt do that it just does that when the knob is on the front windshield defroster could someone tell me how to solve the problem what to check or where to clean ok thank u!!
 
Could be a vacuum leak. If I'm not mistaken the temp. control unit in the van is vacuum operated. Have the vacuum lines all checked.
 
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