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Idle rev low then high?!?!?!

Joeeey Mar 19, 2013

  1. Joeeey

    Joeeey S3

    Afraid to say guys that my first post on the site is with a problem!

    ive noticed that when i let the car idle it is lower than normal and sounds like its about to cut out, then it revs up on its own to about 250,000 revs and then drops back down and keeps doing this :S

    sounds like it might be a leak on 1 of the hoses but im no expert!
    just wondering if anyone has has this problem and if they can point me into the right direction?

    Cheers guys!
  2. _G_

    _G_ Active Member

    Probably not the first thing you want to read when coming to the site for help but use the search feature. Seriously it is a life saver! Welcome to the forum.
  3. Sidhu88

    Sidhu88 Active Member

    What car du have? I'd love to see if rev to 250000 rpm lol. Jokes aside, it could be a number of things. If its a diesel with a dpf it cud be running thru a regen. Could also be a fault maf or lambda sensor. Could be many things, under what conditions does it normally happen?
  4. MrLapou

    MrLapou Well-Known Member

    Yip check hoses for leak. Also the oil filler cap and dip stick are properly secure.

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