Running a bit rough when cold

1. DannyVTS Established Member Joined: Apr 2010 Pontefract Posts: 2177

   #1 6th January 2011, 20:45

   Over the past week when i've gone to use the VTS from cold it has been running a bit rough ie splutting a bit through the revs
   
   It's nothing serious and always sorts itself out after a minute or so of driving (I always let her warm up a little before driving)
   
   Any common faults on the 16v's to cause this behaviour?
   
   Or any common theory's?
   
   Danny
2. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #2 6th January 2011, 20:46

   Idle control valve,coolant temperature sensor both things that affect idling.
   
   Steve.
3. DannyVTS Established Member Joined: Apr 2010 Pontefract Posts: 2177

   #3 6th January 2011, 20:49

   Its not the idle mate the idle is fine.
   
   Just when you rev up to and before 2k RPM that it gets a bit rough.
   
   Thanks for the Input
   Danny
4. DannyVTS Established Member Joined: Apr 2010 Pontefract Posts: 2177

   #4 9th January 2011, 01:00

   Bump ran like a dog off and on even when warm tonight Cleaned my idle control valve and throttle body housing all is okay there as far as i can tell
5. J222JRA Saxperience Hardcore! Joined: May 2007 Posts: 16839 Saxo VTS, Westfield

   #5 9th January 2011, 01:04

   coilpack could be on its way out causing an intermitent miss.
6. DannyVTS Established Member Joined: Apr 2010 Pontefract Posts: 2177

   #6 9th January 2011, 01:05

   That a common fault? Is there a method to check?
7. J222JRA Saxperience Hardcore! Joined: May 2007 Posts: 16839 Saxo VTS, Westfield

   #7 9th January 2011, 01:09

   Yeah it is quite common for them to start breaking down over a period of time.
   
   Not sure of other ways of testing it but i got it on a disgnostics machine and it showed the voltages the coils were producing. One of the voltages was breaking down occasionally.
   
   Best plan would be to ask a mate with a vts to let you try their coilpack on your car.
8. DannyVTS Established Member Joined: Apr 2010 Pontefract Posts: 2177

   #8 9th January 2011, 11:26

   I''ll see what i can do
9. DannyVTS Established Member Joined: Apr 2010 Pontefract Posts: 2177

   #9 9th January 2011, 12:32

   Just cleaned the MAP sensor and it seems a lot better didn't mis fire once on the quick test drive will have to see if it lasts
10. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

    #10 9th January 2011, 12:55

    Quote:

    Originally Posted by DannyVTS Just cleaned the MAP sensor and it seems a lot better didn't mis fire once on the quick test drive will have to see if it lasts

    Out of interest mate where is the MAP sensor located and what did you clean it with?I ask because i`m running out of options on my car i`ve been told either MAP sensor or Lambda sensor faulty.
    
    Cheers.
    
    Steve.
11. DannyVTS Established Member Joined: Apr 2010 Pontefract Posts: 2177

    #11 9th January 2011, 16:32

    Its to the left of the throttle body housing and screws onto the engine with a single allen headed bolt
    
    I just soaked both parts in WD40 - my problem has lessend but is still present

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