co2 emissions failing mot test

1. user_12308 Saxperience Forum Bum Joined: Nov 2006 The Lang Toun Posts: 4133 Mk2 Clio V6 #007 of 354

   #1 22nd August 2008, 14:01

   anyone know of what (if anything) is the major controller/contributor of the co2 emissions?
   
   just failed my mot cause my co2 emissions are currently
   
   at 2739rpm
   0.97%
   
   at 2879rpm
   0.82%
   
   the max limit on both is 0.3%...
2. user_12308 Saxperience Forum Bum Joined: Nov 2006 The Lang Toun Posts: 4133 Mk2 Clio V6 #007 of 354

   #2 22nd August 2008, 14:11

   i had problems with my last mot and the emissions but my cat was knackered, replaced it and it passed ok. have searched around here and read whats been asked/written on the topic but am still stuck
3. pepper953 Established Member Joined: Dec 2006 Posts: 1280

   #3 22nd August 2008, 23:02

   lamba sensor is main culprit ,also do a fresh oil change and give a good run(thrash)
   before retest normaly cures it
4. makaveli144 Saxperience Forum Bum Joined: Feb 2007 Burton Posts: 3661 Alfa Romeo GT

   #4 22nd August 2008, 23:06

   Sounds like the lambda to me. the ecu light isnt on is it? When the lambda went on my VTR it ran so rich that petrol came out the end of the exhaust.
5. user_14757 Established Member Joined: Mar 2007 Middlesbrough Posts: 1186 mazda 3 mps

   #5 23rd August 2008, 00:19

   on one of ma old vtr's i had it de-cat'd.. had a chat to the tester and he took the emisisons test of another car for a extra 20£, good deal i thought.
6. Gabbastard Saxperience Post Whore Joined: Dec 2002 United Kingdom Posts: 8390

   #6 23rd August 2008, 10:51

   Quote:

   Originally Posted by dannygxx on one of ma old vtr's i had it de-cat'd.. had a chat to the tester and he took the emisisons test of another car for a extra 20£, good deal i thought.

   Saw that happen at an mot station before, a de-catted Saxo was going in, so the tester used a brand new, 1 month old, Punto. It failed LOL
7. user_12308 Saxperience Forum Bum Joined: Nov 2006 The Lang Toun Posts: 4133 Mk2 Clio V6 #007 of 354

   #7 24th August 2008, 01:55

   Quote:

   Originally Posted by Gabbastard Saw that happen at an mot station before, a de-catted Saxo was going in, so the tester used a brand new, 1 month old, Punto. It failed LOL

   haha!
   
   a lamba problem did cross my mind but the emissions are only failing on the co2 levels, nothing else my engine oil is only a bit above the minimum level but dont wana fill it up since i'm getting an engine conversion done in a week
   
   have just had a magnex cat back put on (i know this isn't going to solve the problem but hey ) but thinking of getting a new cat as a while back, i was burning a lot of oil. changed my rocker gover gasket and this seems to have sorted that problem but i may have damaged the cat me thinks
8. spawny Newbie Joined: Mar 2008 worthing Posts: 22 saxo VTR

   #8 24th August 2008, 11:51

   had the same problem about a week ago ended up needing a new lambda sensor and resetting the ecu.
9. phillyc Regular Poster Joined: Feb 2008 torquay (devon) Posts: 269 saxo 02 vtr straight through exhaust

   #9 24th August 2008, 12:45

   mine failed emissions by around the same amount and I just had a new cat fitted the week b4 as it was de-catted. Not sure what he did but he plugged a hand held computer in, dint see where but assume into the ecu and messed around for a few minutes and problem solved.