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2006 Volkswagen Jetta Question: What is causing idling rev & loud screeching sound behind my dash when car warms

 

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Manley531, 2.5L 5 Cylinder, Durango, CO, February 24, 2014, 17:44
 Rookie

My 2006 Jetta revs up, then drops down, and repeats over and over when car idles. Also, after car warms up, or immediately on hot days, there is a loud screeching noise that comes from behind my dash on the passenger side. It has 120,000 miles, and already I have replaced the entire braking system and O2 sensors due to this, but no one seems to be able to guess what the cause is.

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  • Answer #1

    February 24, 2014, 18:31
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     Master

    I think you got two problems ,the screeching I think is the bearing in the heater motor ,no?.
    And they all have that high ,low/ ,problem ,I think throttle body needs cleaning..

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    Manley531, February 28, 2014, 13:13
     Rookie

    Thank you so much! I'm having it looked at next week. I'll let you know how it goes.

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    asksteevies, February 28, 2014, 13:14
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     Master

    Cool

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