Important! : Rough idle, misfiring with VIDEO

1. Technics_1210 Infrequent Poster Joined: Dec 2010 Stratford upon Avon Posts: 223 T reg VTR, Facelift Corolla T sport

   #1 4th January 2012, 14:07

   Firstly i don't think its a problem with idle control valve as i gave it a good clean yesterday, yet the idle is still really rough almost as if it wants to stall. Engine still pulls well in every gear however it just won't idle properly almost as if its firing on 3 cylinders. I'm thinking this could be a coilpack problem as the spark plugs are fairly new can anyone else confirm before i fork out for a new one.
   
   Also i had a diagnostic done and it didn't have any fault codes apart from over fueling which was probably caused by the decat and rough idle.
   
   
   Video link:
   
   http://s1121.photobucket.com/albums/...t=DSCF8744.mp4
2. stuibaby L-plater Joined: Dec 2011 Bristol/Bath Posts: 30 2001 Saxo VTR

   #2 4th January 2012, 14:27

   This may not solve it but it helped my VTR,
   
   Take out the Crank sensor located on front of gearbox and clean the crap off it,
   
   This sorted my idle out
3. eggy01 Regular Poster Joined: Feb 2011 kings lynn Posts: 403 Citroen Saxo Vtr

   #3 4th January 2012, 14:55

   i would put money on it being a spark plug breaking down inside even if they are fairly new some plugs do this ive had it many of times before or coil pack breaking down inside as if you got the car tuned or a higher spec the coil pack and plugs are working harder so will break down quicker, ide try spark plugs first as its alot cheaper than a coil pack if not put coil pack on it and i bet it will solve it
   
   haope this helps matt
4. devilsadvocate Saxperience Post Whore Joined: Dec 2006 Maidstone Posts: 8210 Golf TDI

   #4 4th January 2012, 18:01

   Doesn't sound good, more than just a rough idle I would say.
   
   If you have changed the plugs for new ones then I would go with the coilpack next, pickup a 2nd hand one off here or Ebay. If it's not that then you can just sell it on.
5. Cam Saxperience Post Whore Joined: Nov 2010 Kent Posts: 8439 Gen 7 Celica 190.

   #5 4th January 2012, 18:03

   As said change plugs then coilpack.
6. Xplodee Regular Poster Joined: Dec 2011 Rochester, Kent Posts: 493 Saxo VTR

   #6 4th January 2012, 19:35

   Looks like its in need of a service.
7. Technics_1210 Infrequent Poster Joined: Dec 2010 Stratford upon Avon Posts: 223 T reg VTR, Facelift Corolla T sport

   #7 8th January 2012, 12:14

   Changed spark plugs, coilpack and cleaned ICV still not running properly, over fueling like mad any other suggestions?
8. jayVTR30 Newbie Joined: Jan 2012 bolton Posts: 6 saxo vtr

   #8 20th January 2012, 14:45

   Quote:

   Originally Posted by Technics_1210 Changed spark plugs, coilpack and cleaned ICV still not running properly, over fueling like mad any other suggestions?

   looks like its blowing black smoke eg overfueling causing missfire.
   check lambda-map sensor-watertemp sensor.
9. Technics_1210 Infrequent Poster Joined: Dec 2010 Stratford upon Avon Posts: 223 T reg VTR, Facelift Corolla T sport

   #9 22nd January 2012, 09:48

   Quote:

   Originally Posted by jayVTR30 looks like its blowing black smoke eg overfueling causing missfire. check lambda-map sensor-watertemp sensor.

   Hi its fixed now, ended up just changing every sensor because i got so pissed off with it. Running perfect again my guess is that it was a dodgy lambda sensor but I guess I'll never really know now.
10. jayVTR30 Newbie Joined: Jan 2012 bolton Posts: 6 saxo vtr

    #10 25th January 2012, 20:54

    glad ur sorted. shame you couldnt of pinpointed which sensor deffo cured it.