Juddering at constant speed

1. fionnuala Newbie Joined: May 2009 Belfast Posts: 4 1.0l 1999 Saxo Spree

   #1 13th May 2009, 15:08

   Hi there,
   Im new to this forum but i got a 1999 saxo 1.0 spree a few weeks back and ive noticed some problems with it.
   when im driving at a constant speed the car starts to judder and if i take any pressure off the accelorater it gets even worse and starts to bunny hop. if i stay with it for a minute it goes away but will come back again soon after. it feels like something isnt getting through somewhere but im not sure exactly what. ive read other posts with similar problems. i've changed the spark plugs and leads, changed the oil, oil filter, fuel filter and air filter and hasnt made a difference. i was wondering if anyone could tell me where the different sensors are on the car as ive noticed they keep coming up in other threads. could someone also tell me where the fuel injectors are so that i can give them a clean and if my model has an idle control valve.
   Any help would be really appreciated
2. BobCm Forum Section Moderator Joined: Apr 2009 Orpington Posts: 1406 My son drives a Poseidon Blue Saxo Mk2 1.6i VTR.

   #2 13th May 2009, 19:55

   Hi,
   
   It could be electrical, fuel or clutch related. Does it judder if you push the clutch in?
3. Stevo123 Established Member Joined: Apr 2009 Redcar Posts: 1971 2000 Posi Blue vtr

   #3 14th May 2009, 07:26

   Check for air leaks on the inlet side, sound like you are running a lean mixture. If you have single point injection check the unit is securely bolted to the inlet manifold for example. You can spray wd40 over joints and it should be evident if the wd40 is sucked into the joint then it is leaking.
   
   As above could be electrical problem, but if it was I would expect missfires on tickover/load as well.
4. fionnuala Newbie Joined: May 2009 Belfast Posts: 4 1.0l 1999 Saxo Spree

   #4 14th May 2009, 12:51

   yes still judders if i push the clutch in. can you temm me where all the joints and sensors are? bit of a novice. thanks
5. carlos7777777 Frequent Poster Joined: May 2008 newcastle/norwich/london Posts: 888 was: mk1 1.1 saxo now: mk2 1.2 punto

   #5 14th May 2009, 12:54

   also try some redex some halfords, that helped my mams corsa anyways...
6. fionnuala Newbie Joined: May 2009 Belfast Posts: 4 1.0l 1999 Saxo Spree

   #6 15th May 2009, 22:09

   well so foar all sensors have been sprayed with wd40, the single injector has been cleaned and refited, been using red x for about the last 2 weeks and as above all new sparkplugs and leads with filiter change. would it have anything to do with the fuel pump, lambda sensor or idle control vale as these are yet to be checked or changed? if it was an electrical problkem would the engine management light not come on on the dash?
7. nos4r2 Newbie Joined: Jun 2011 S.Wales Posts: 6 Saxo 1.0

   #7 13th June 2011, 00:13

   Hi. I am new here, I have the same issue with my car which is a saxo spree 1.0. i have used your forum search and found this page, so I am bumping it rather than creating a new post. I had the front arm replaced to pass an mot a few months back, and the juddering stopped, but unfortunately has started happening again. Any help would be much appreciated. Thanks.
8. ceff01 Newbie Joined: May 2011 redditch Posts: 19 citroen saxo vtr 1.6 2001

   #8 13th June 2011, 07:44

   its a flywheel
9. nos4r2 Newbie Joined: Jun 2011 S.Wales Posts: 6 Saxo 1.0

   #9 13th June 2011, 10:28

   would the fly wheel cause it to drop revs though. It feels as if all of a sudden the reves drop right down, loose power and then pucks back up again causing the car to judder and bunny hop .
10. user_4681 Saxperience Post Whore Joined: Dec 2004 Grimsby United Kingdom (England) Posts: 5489 SUPERCHARGED saxo vts

    #10 14th June 2011, 12:13

    Sounds like coil pack to me