saxo revving

  1. Regular Poster Joined: Apr 2009 welshpool Posts: 260 Black 1998 vtr R.I.P :( Red 1.1i saxo
    #1
    my vtr has started to rev on its own. only does it when it starts up
    its at about 2500.3000rpm, then it settles down
    what could it be? thanks
  2. Established Member Joined: Mar 2010 Cupar Fife Posts: 1712 1600 16v VTS 1600 8v VTR 1400 16v Clio Sport
    #2
    have u got an oversized backbox or induction on it because my old clio did it and iv heard tht some cars do it because it confuses the cars air fuel mix so the car thinks its getting loads of air so gives it loads of fuel so the engine dies down since its not getting what it thinks it is but as it dies down it realises its getting to much fuel so gives it more and just confuses the electrics, if u have got a big filter on it try the airbox back on, failing that i would say check ur idel.
  3. Super Moderator Joined: Aug 2006 Staffs Posts: 3778 207 HDi GT
    #3
    Probably the Idle Control Valve or Map sensor. That is either dirty or knackered.

    Take both off, clean them, Put back on.

    May solve the problem, as its free to do try it first
  4. Regular Poster Joined: Apr 2010 Cheshire Posts: 441 furio ;)
    #4
    quick fix... just give it a quick rev whilst not in gear and it stops... my sisters clio does it... its the fuel to air ratio
  5. Infrequent Poster Joined: Mar 2004 Stocksbridge, Sheffield Posts: 182 Mercury Grey VTS 1998
    #5
    could also be coolant sensor, would check ICV and MAP first
  6. L-plater Joined: Jul 2010 caerphilly Posts: 59 saxo furio
    #6
    yeah my furio does that asswell, i just rev and its goes back to normal
  7. Regular Poster Joined: Apr 2009 welshpool Posts: 260 Black 1998 vtr R.I.P :( Red 1.1i saxo
    #7
    thanks for all your replies, i will check it out on the weekend and let you know
    many thanks. x