Engine revving itself

1. mhb4468 Newbie Joined: Dec 2007 Forres, Scotland Posts: 9 51 Plate 1.1 Forte, 06 C4 VTR HDi

   #1 23rd March 2008, 19:22

   Anyone had this sort of problem on a Saxo.
   
   Car has been sitting in the garage for a couple of months, but took it out for a run today. Drove about 10 miles and stopped at a junction, everything seemed fine, but then the engine started revving all on it's own. Not high revs, about 1500 to 2000, like I was sitting there blipping the throttle.
   Switched the car off and restarted, idled no problem, but as soon as I touched the throttle it started again.
   On the way home I gave it a bit of a clear out, ok thrashing and by the time I got home, approx 15 miles, the problem had disappeared.
   
   Any ideas?
2. steve_335 Saxperience Forum Bum Joined: Aug 2007 Wickford, ESSEX Posts: 3094 citroen saxo 1.1 VW polo 1.4 16v Fiesta 1.25

   #2 23rd March 2008, 19:29

   Could have been accelerator pedal being a bit sticky if you hadn't driven it for a few months, and once you used it it unstuck and went back to normal.
3. bexster82 Frequent Poster Joined: Feb 2008 southampton Posts: 618 Saxo VTR

   #3 23rd March 2008, 19:30

   could be either:
   
   Idle Control Valve?
   
   coolant temperature sensor?
   
   MAP sensor on the inlet manifold but you can never tell
4. TU-Tuning Saxperience Hardcore! Joined: May 2006 Bristol Posts: 16575 JP4urio, 306 DTurbo SportShed

   #4 23rd March 2008, 19:31

   Could be the idle control valve, theyre only about 15-25 quid new i think.
   
   
   
   I had this before though, turned out it was just a badd battery connection that i hadnt clamped on properly. Mine was revving its tats off though, which was really embaressing
5. Delboy75 Frequent Poster Joined: Dec 2005 Posts: 841 ford focus 1.8....saxo now sold :(

   #5 23rd March 2008, 19:31

   Mrs had this on her corsa and it was the idle control valve.
   
   Del
6. AdamH Saxperience Forum Bum Joined: Oct 2004 South Posts: 3638

   #6 23rd March 2008, 19:31

   idle controle sensor i vote
   
   if its fine when you turn it off and switch back on after a few seconds theirs not much more it could be..
   
   when you do tho. does it idle at the usual 800rpm after the choke.. or was the engine still cold and it idled at 1000 ?
7. bexster82 Frequent Poster Joined: Feb 2008 southampton Posts: 618 Saxo VTR

   #7 23rd March 2008, 19:32

   try Idle control valve as 3 of us have mentioned it - lol
8. TU-Tuning Saxperience Hardcore! Joined: May 2006 Bristol Posts: 16575 JP4urio, 306 DTurbo SportShed

   #8 23rd March 2008, 19:32

   We may all just be stupid
9. steve_335 Saxperience Forum Bum Joined: Aug 2007 Wickford, ESSEX Posts: 3094 citroen saxo 1.1 VW polo 1.4 16v Fiesta 1.25

   #9 23rd March 2008, 19:33

   If it stopped, probably was a sticky accelerator cable, had to change one before as car revved itself, bloke said it had been in a garage for a while and only started once he started drivivng it again, might be worth a shout, will be cheaper than an idle control valve too.
10. bexster82 Frequent Poster Joined: Feb 2008 southampton Posts: 618 Saxo VTR

    #10 23rd March 2008, 19:33

    i know im stupid - lol
11. steve_335 Saxperience Forum Bum Joined: Aug 2007 Wickford, ESSEX Posts: 3094 citroen saxo 1.1 VW polo 1.4 16v Fiesta 1.25

    #11 23rd March 2008, 19:34

    Could just stick some wd40 on the cable would probs stop it sticking.
12. frankie Saxperience Addict Joined: Apr 2006 Frome, down deepest, darkest zummerset Posts: 12971 VTRallye

    #12 23rd March 2008, 19:36

    idle control valve, changed mine solved it.
    
    mine revs itself, funny as i think
13. MK2SLAG Saxperience Forum Bum Joined: Feb 2008 n.scotland Posts: 3292 le 2bhp le feet

    #13 23rd March 2008, 19:39

    could also be the stepper motor,try a washer in it
14. mhb4468 Newbie Joined: Dec 2007 Forres, Scotland Posts: 9 51 Plate 1.1 Forte, 06 C4 VTR HDi

    #14 23rd March 2008, 19:41

    Thanks guys. Will keep an eye on it. Don't think it's the cable, so the idler valve may be the fault. I had to jump start the car in the first place as it had gone flat with lying in the garage. Don't know if that would have made any difference.
15. mhb4468 Newbie Joined: Dec 2007 Forres, Scotland Posts: 9 51 Plate 1.1 Forte, 06 C4 VTR HDi

    #15 23rd March 2008, 19:44

    Stepper motor???? Where's that?
16. MK2SLAG Saxperience Forum Bum Joined: Feb 2008 n.scotland Posts: 3292 le 2bhp le feet

    #16 23rd March 2008, 19:45

    would have looked at it if you were through in inverness mate,sounds like the stepper motor not the idle control valve,but would really have to see it first!
17. MK2SLAG Saxperience Forum Bum Joined: Feb 2008 n.scotland Posts: 3292 le 2bhp le feet

    #17 23rd March 2008, 19:47

    basically an electric motor without a commutator,its just beside the throttle body,black box
18. mhb4468 Newbie Joined: Dec 2007 Forres, Scotland Posts: 9 51 Plate 1.1 Forte, 06 C4 VTR HDi

    #18 23rd March 2008, 19:52

    I was in Elgin when it started, Halfords car park to be exact. Is there an easy check that can be done at home or should I leave it until it does it again.
19. fenix L-plater Joined: Jan 2008 Posts: 48 Citroen Saxo 1.1i east coast edition

    #19 25th April 2008, 22:38

    I have excatly the same problem, sometime it revs with clutch down, and sometime when not in gear and when i press accellerator
    
    i got a diagnostic, and it was the stepper motor, i'm now looking for one, but they're difficult to find!!
20. Rootyuk Established Member Joined: Jun 2007 Falmouth Posts: 1079 saxo 1.1i desire

    #20 26th April 2008, 10:05

    this may seem really really stupid but mine done this before i replaced a few things and when i put a new air filter on it stopped. thought this was weird so i put the old one bak on jus to check and it started revving itself again.
21. Simps86 L-plater Joined: Jun 2006 Northwich United Kingdom (England) Posts: 68 Renaultsport Clio 182 Trophy

    #21 26th April 2008, 17:55

    ICV most likley
22. -stu- L-plater Joined: Aug 2007 Posts: 69 Saxo 1.1

    #22 27th April 2008, 14:48

    I had this problem too, shitroen ended up changing the stepper motor, along with some sensors. This diddnt get rid of the revving, so next they changed the air intake box and ive never had a problem since.
23. Emmalouise959 Newbie Joined: Apr 2008 Dorset Posts: 1 Gold Saxo Vtr

    #23 27th April 2008, 14:57

    My vtr does the exact same thing! Usually when ive driven a far distance. Is it sumthing 2 worry bout?
24. fenix L-plater Joined: Jan 2008 Posts: 48 Citroen Saxo 1.1i east coast edition

    #24 21st May 2008, 16:16

    Problem solved, Gotta new stepper motor for a tenner and fixed =)
25. TomsSaxoFurio Newbie Joined: Jan 2011 Posts: 1

    #25 4th January 2011, 15:01

    Mines done this before but it seemed to have sorted itself until 2day when it was being an utter beeyotch!
    
    Had a new battery in 2day and after a reasonable drive it started doing it constantly. Coming up to for example traffic lights, with the clutch disengaged the revs would blip between about 1200-1800 rpm then as it came to a complete stop it would idle at 2000.
    
    Took it straight back to the garage and they are looking over it now. When I have an answer I'll be sure to pass it on