Important! : mot failure (emisssions) help

1. sm1thyvtr L-plater Joined: Feb 2009 derby Posts: 40 mk1 saxo vtr

   #1 28th February 2009, 18:58

   had emissions test need help on what the problem is, it falied on:
   1st fast idle:
   actual: co 3.72% limit 0.30%
   actual: hc 330ppm limit 200
   actual: lambda 0.91 limit 0.97-1.03
   
   second fast idle:
   actual: co 3.65%
   actual: hc 308ppm
   actual: lambda 0.93
   
   natural idle:
   acutal c0 1.97% limit 0.50
   
   please help
2. matt6795 L-plater Joined: Dec 2008 ashbourne Posts: 46 mk 2 posi blue saxo, toyota celica gt4

   #2 28th February 2009, 19:02

   i think your cat has gone mate that the main problem
3. sm1thyvtr L-plater Joined: Feb 2009 derby Posts: 40 mk1 saxo vtr

   #3 28th February 2009, 19:52

   my cat? i got told it was my lambda sensor hence why it was only at 0.91 when it shud be at 0.97-1.03
4. user_30915 Infrequent Poster Joined: Feb 2009 yatton/bristol Posts: 153 mk1 vtr mk5 golf fsi

   #4 1st March 2009, 07:59

   try a new lambda sensor first if that doesnt cure i suggest changing the cat!!
5. Mr_suv Saxperience Forum Bum Joined: Aug 2007 blandiago Posts: 4483 Hondaaaa

   #5 1st March 2009, 09:07

   i dont think its your cat il guarentee it one of the two:
   timing slightly out
   lambda sensor .
   reason i say its not your cat is because if you decat it you should be getting 0.60 ish after the lamba not 3.72 co2 levels im on about
6. sm1thyvtr L-plater Joined: Feb 2009 derby Posts: 40 mk1 saxo vtr

   #6 1st March 2009, 10:36

   i changed the lambda sensor it dont feel that much diff driving feels bit quicker thou. it dont smell as much out of the exhaust either it was strong before but not as much now. it cant be my timing either because it was changed 10.000 miles ago. so it got to be the lambda sensor i guessing?