revs dropping too quick and bouncing

1. vtrmann Frequent Poster Joined: Dec 2009 E yorkshire Posts: 947 53 black vtr

   #1 3rd April 2012, 11:30

   hi had this problem a while now it used to cut out doing it, as soon as i dip the clutch coming up to a junction the revs drop really quick and start going up and down near 1k revs. ive changed nearly every sensor and icv. the only thing i havent changed is the lambda sensor. i also get a slight shudder when the revs pass 1.5k revs and when pulling away. any ideas on this as i cant seem to get to the bottom of this problem. hope someone can help cheers
2. W343NNA Frequent Poster Joined: Mar 2012 Derbyshire Posts: 770

   #2 3rd April 2012, 11:37

   When was the last time you did a service ? get your self down halfords buy some bosh super four plugs, oil and a filter and get fitting it, i was suprised at what a differnece it made on my car, if its still doing it after that then id recomend changing the lambda but it sounds like your plugs are nackerd, also could be your coilpack,
3. vtrmann Frequent Poster Joined: Dec 2009 E yorkshire Posts: 947 53 black vtr

   #3 3rd April 2012, 11:42

   Quote:

   Originally Posted by W343NNA When was the last time you did a service ? get your self down halfords buy some bosh super four plugs, oil and a filter and get fitting it, i was suprised at what a differnece it made on my car, if its still doing it after that then id recomend changing the lambda but it sounds like your plugs are nackerd, also could be your coilpack,

   ive changed plugs they were clean but did anyway, coil pack, fuel filter, fuel pump, air filter, injectors, oil change was about year ago.
4. W343NNA Frequent Poster Joined: Mar 2012 Derbyshire Posts: 770

   #4 3rd April 2012, 11:45

   probs take plugs out and clean them up then, sounds like a coilpack or lambda issue to me mine used to do it at low ravs used to hold back then suddenly jump forward sorta thing, verry bad when cold
5. Sinque Regular Poster Joined: Nov 2008 Posts: 362 Saxo 1.4 Furio

   #5 3rd April 2012, 11:45

   I'm in the same boat pal. Changed all sorts and it's exactly the same...
6. vtrmann Frequent Poster Joined: Dec 2009 E yorkshire Posts: 947 53 black vtr

   #6 3rd April 2012, 11:59

   Quote:

   Originally Posted by Sinque I'm in the same boat pal. Changed all sorts and it's exactly the same...

   yea its pretty annoying when spent loads and still the same. im gonna have a look at lambda when it stops pissin it down. anybody know what signs to look for like what colour it should be?
7. user_46658 Saxperience Post Whore Joined: Aug 2010 Little Mill, South Wales Posts: 7547 Mondeo ST TDCI Saxo VTS

   #7 3rd April 2012, 12:01

   Have you changed the green temperature sensor?
8. vtrmann Frequent Poster Joined: Dec 2009 E yorkshire Posts: 947 53 black vtr

   #8 3rd April 2012, 12:14

   Quote:

   Originally Posted by Brettles1986 Have you changed the green temperature sensor?

   yes i borrowed a few from the scrapyard and each one made no difference and dont think all of them would be dodgy.
9. user_46658 Saxperience Post Whore Joined: Aug 2010 Little Mill, South Wales Posts: 7547 Mondeo ST TDCI Saxo VTS

   #9 3rd April 2012, 12:16

   ah right ok, I had this and the temp sensor was the last one I tried (about £12 new) and that resolved it, I did replace the MAP sensor before hand though.
10. user_58217 Regular Poster Joined: Mar 2012 Bristol Posts: 265 Vectra 2.2 Elite

    #10 3rd April 2012, 12:18

    Quote:

    Originally Posted by W343NNA probs take plugs out and clean them up then, sounds like a coilpack or lambda issue to me mine used to do it at low ravs used to hold back then suddenly jump forward sorta thing, verry bad when cold

    Yeah I have the same issue, especially when its cold
11. user_46658 Saxperience Post Whore Joined: Aug 2010 Little Mill, South Wales Posts: 7547 Mondeo ST TDCI Saxo VTS

    #11 3rd April 2012, 12:20

    Quote:

    Originally Posted by W343NNA probs take plugs out and clean them up then, sounds like a coilpack or lambda issue to me mine used to do it at low ravs used to hold back then suddenly jump forward sorta thing, verry bad when cold

    This does sound like a coilpack issue but if the car is only trying to stall and no other performance issues then I would say the coilpack is not the problem
12. Sinque Regular Poster Joined: Nov 2008 Posts: 362 Saxo 1.4 Furio

    #12 3rd April 2012, 12:26

    Mine idles fine and everything even when cold but revs stick and power drops then surges and if I drop my clutch it cuts out.
    
    A new map sensor made things worse for me which I dont understand. I've just checked my lambda, in the rain, and it's clean as a whistle. A new coil pack made no difference. I put drops of water on each manifold outlet and the water dried up evenly so all are firing.
    
    I've cleaned the throttle body, oil change, oil filter, fuel filter, air filter, new plugs, coil pack, map sensor and still feels dodgy.
    
    But it could be an intermittent problem. So my coil pack could work sometimes and then sometimes not so when I try another and there's no change I rule that out.
    
    Been struggling with this for months now...
13. vtrmann Frequent Poster Joined: Dec 2009 E yorkshire Posts: 947 53 black vtr

    #13 3rd April 2012, 13:42

    i just took the lambda out and its a brown rusty colour is this normall? and is it possible to clean them?
14. m3wood Regular Poster Joined: Jan 2012 dereham Posts: 429 mitsubishi carisma saxo vtr

    #14 3rd April 2012, 13:46

    How many miles you covered over the last year ??
15. Sinque Regular Poster Joined: Nov 2008 Posts: 362 Saxo 1.4 Furio

    #15 3rd April 2012, 14:04

    Quote:

    Originally Posted by vtrmann i just took the lambda out and its a brown rusty colour is this normall? and is it possible to clean them?

    Replace it to be honest mate