Important! : VTR is revving by itself!

  1. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #1
    Hey guys, went to start my car the other day, was very sluggish to turn on (turns out i needed a new alternator but got that sorted and battery charged) but once i turned it on it was revving at 3-4k RPM all by itself. Replaced a few sensors and things and it's still doing it! any ideas what cuold be wrong? Need to try and get the car sorted asap cause i need it for uni on monday
  2. Established Member Joined: Jul 2012 Posts: 1050 Volkswagen Bora 170bhp
    #2
    Could possibly be the idle control valve but could be wrong
    1 user thanked this post:
  3. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #3
    Already been changed. But thank you

    Anymore suggestions welcome!
  4. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #4
    Things that have been changed:
    - coil pack
    - throttle positioning sensor
    - idle control sensor
    - airflow sensor
    - and some other wee sensor on top on the coil (no idea what it does, but it was changed anyway just to see and no change)
  5. Established Member Joined: Jun 2013 York Posts: 2134 Citroen Saxo VTR (2001)
    #5
    Crank sensor? Temperature sensor?
    1 user thanked this post:
  6. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #6
    That's something that may be worth a try I suppose. Thank you
  7. Regular Poster Joined: Oct 2009 Leicester Posts: 257 Mango Westcoast
    #7
    I had this after I recharged my battery, it stopped on its own after a while, but I had to drive it around the block a few times like that.
  8. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #8
    I'm too scared to drive it in case it blows something!
  9. Regular Poster Joined: Oct 2009 Leicester Posts: 257 Mango Westcoast
    #9
    When you let the clutch to bite point the revs will drop down, after 5 minutes of driving on and off the clutch every so often mine was back to a normal idle.

    Just be careful if you do, it will drive itself!!
  10. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #10
    My cousin who is a mechanic drove it earlier today and said it didn't sound good at all, he is advising against it. HE said it sounded like a WRC car, and not in a good way! lol
  11. Frequent Poster Joined: Mar 2008 Glasgow Posts: 565 Saxo Vts Mk1 1997
    #11
    unlikely but check the throttle cable as if sticking or not running free can cause this issue

    It is easy to check its running free and the throttle is moving as it should

    Guess it has already been looked at ?
  12. Regular Poster Joined: Oct 2009 Leicester Posts: 257 Mango Westcoast
    #12
    Quote:
    Originally Posted by gilly9092 View Post
    My cousin who is a mechanic drove it earlier today and said it didn't sound good at all, he is advising against it. HE said it sounded like a WRC car, and not in a good way! lol
    Sounds like your issue could be a bit worse than mine. Hope you get it sorted
  13. Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.
    #13
    Switch the ignition on/off 6 times without starting the car(sets up the icv)if that doesn`t work unplug the battery for 1/2 an hr(resets the ecu)
  14. Saxperience Addict Joined: Dec 2009 Posts: 11714 A6 Le Mans tuned/A3 TFSI tuned
    #14
    These cars rev up when the battery charge is down in order to compensate. Have it checked so it shows 12.2 volts and 14.4 when running, plus that it has as many amps as it says on it.

    Quote:
    Originally Posted by gilly9092 View Post
    My cousin who is a mechanic drove it earlier today and said it didn't sound good at all, he is advising against it. HE said it sounded like a WRC car, and not in a good way! lol
    that does not tell much, it could be for a number of reasons.
  15. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #15
    Will give these things a go. Really hoping it's not an ecu problem... just after having the ecu refurbished back in November cause it shat itself the night before its MOT.
  16. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #16
    actually, throttle cable is perfect.

    and battery was disconnected to charge for long enough while i was away sourcing an alternator yesterday ... was still revving high when new alternator and fully charged battery went in
  17. Frequent Poster Joined: Feb 2012 Portsmouth Posts: 568 1992 MX-5 1.6 SE
    #17
    I sold my car to a guy who had this problem, was majorly pissed as you can imagine. I did a lot of research and tried all the possible things with no luck. Turned out the manifold was loose because I'm a twat, worth checking that before you throw any money at it!
    1 user thanked this post:
  18. Saxperience Post Whore Joined: Jul 2011 Newcastle upon Tyne Posts: 7779 Phase 2 VTS , E61 M5
    #18
    Have you cleared any error codes with a laptop?
  19. Established Member Joined: Dec 2011 Derby Posts: 1021 Posi saxo, flatty, Peugeot bipper, Vauxhall vectra
    #19
    Turn your key to on position wait 10 seconds then turn it off, then turn it back to the on position again 6 times.. Then drive 10 miles or something like that. To reset the ecu. Mite not work but its worth a try
  20. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #20
    have changes the coil pack twice and every sensor in the bloody thing twice to see. still nothing! The old lady is giving up on me

    have tried the ignition thing. worked for like 30 seconds and then started revving at 4k by itself again... never drove it though... too scared to, could it not cause a lot of damage?

    will check the manifold thing. ya never know

    Thanks guys... will try and keep you updated
  21. Regular Poster Joined: Jun 2012 Posts: 259 Two-tone Saxo VTR
    #21
    still nothing guys