Rough Idle. Cutting out. Jerky acceleration. And no power.

  1. Regular Poster Joined: Jan 2012 Huddersfield Posts: 490 Saxo Desire 1.1
    #1
    Hi.

    Basically, my engine doesn't idle well at all. Really lumpy, and then suddenly drops revs to 100 and revs back up to around 3000, sometimes with a slight misfire. Sometimes the revs wont catch and the engine will cut out.

    Also, when driving at low revs, the car jerks a lot until it is at around 2500 revs, and then drives fine.

    Sometimes leaving junctions, the engine will lose all power and I have to dip the clutch and start again, whilst rolling into the middle of the road.

    What have I changed?

    I have currently changed the map sensor. This caused the engine to idle at around 2000 revs, constantly. But idled smoother, just at extremely high revs.

    Coil Pack. This did eliminate misfires whilst driving.

    Spark plugs. This didn't do much, but they needed changing anyway.

    WHAT ELSE COULD I DO?!

    I have some ideas... ICV sensor? Crank Sensor? Throttle Position Sensor?

    Any ideas are welcome... Just want to get it running smooth asap!
  2. Newbie Joined: Sep 2013 Conwy Posts: 9 Citroen Saxo VTR Mk2
    #2
    It could possibly be a faulty HT lead. I had a similar problem before thinking it was something serious but ended up just being one of the HT leads jumping to the head.

    They're cheap to buy and if the plugs needed changing then more than likely the leads need changing too.
  3. Saxperience Forum Bum Joined: May 2011 huddersfield Posts: 2635 ph3'd c2 gt
    #3
    it doesnt have ht leads
  4. Newbie Joined: Sep 2013 Conwy Posts: 9 Citroen Saxo VTR Mk2
    #4
    Quote:
    Originally Posted by Ali123 View Post
    it doesnt have ht leads
    Are you sure on that? i'm pretty sure it's got HT leads...

    http://en.wikipedia.org/wiki/High_tension_leads
  5. Saxperience Forum Bum Joined: May 2011 huddersfield Posts: 2635 ph3'd c2 gt
    #5
    it doesnt have ht leads though. just a coilpack for all 4
    andd we also changed the coilpack for a known working one
  6. Newbie Joined: Sep 2013 Conwy Posts: 9 Citroen Saxo VTR Mk2
    #6
    The HT leads are the leads from the coilpack to each spark plug...
  7. Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182
    #7
    There are no leads on the later 8vs and 16vs though. The coil pack fits direct to the plug via a rubber connector
  8. Saxperience Forum Bum Joined: May 2011 huddersfield Posts: 2635 ph3'd c2 gt
    #8
    yeah but when you generally talk about this set up, you say coilpack dont you rather than, oh its your ht leads when it doesnt run ht leads as such
  9. Saxperience Forum Bum Joined: May 2011 huddersfield Posts: 2635 ph3'd c2 gt
    #9
    Quote:
    Originally Posted by Gandi699 View Post
    There are no leads on the later 8vs and 16vs though. The coil pack fits direct to the plug via a rubber connector
    thank you!
  10. Newbie Joined: Sep 2013 Conwy Posts: 9 Citroen Saxo VTR Mk2
    #10
    Ok, that's where we were confused, when you said you replaced the coil pack I thought you was referring to the ignition coil itself rather than the the ignition rail as I didn't know you had a later model, appologies.
  11. Saxperience Forum Bum Joined: May 2011 huddersfield Posts: 2635 ph3'd c2 gt
    #11
    haha it isnt my car, its my mates
    and no worries
  12. Newbie Joined: Sep 2013 Conwy Posts: 9 Citroen Saxo VTR Mk2
    #12
    I only recently purchased my VTR and it has the saxperience sticker in the rear window so probably someone on here might recognise it and know more about it than I do.
  13. L-plater Joined: Jul 2011 Leigh, Lancashire Posts: 56 16v'ed 03 VTR
    #13
    I had the exact same problem on my VTS. I replaced the ICV and It fixed the problem