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tony16v
20-10-2005, 13:53
Hi,

I just got back from my MOT test and the car failed on the CO2 emissions...

They were well over the allowed 0.30, and I was wondering if that means that the CAT as packed up???

does anyone know what the CAT actually does??

I dont want to pay out 200 quid if its not the CAT...

Cheers Tony.
Rich
20-10-2005, 14:09
either that or the lambda sensor, the garage should tell you should they not?
tony16v
20-10-2005, 14:12
tbh mate wouldn't trust the garage... would rather ask on here cos you lot probably know more about these cars then anyone...
northy
20-10-2005, 14:18
if you have a decat on then the emissions will be too high and fail.

i know as ive tried....can you remove your cat and have a look iside to see if everything is well ?

what was the engine temp when they tested it ?
tony16v
20-10-2005, 14:25
the oil temp was above 80 when he did the test... but the car had been sat about for a while....
Zollo
20-10-2005, 15:23
Is this the Williams mate?

If so, not sure what it could be, as it's had quite a few of the obvious things replaced already. When it had the MoT done back in May(ish), the emmissions test was conveniantly ignored though! Perhaps linked to the occasional cold-start stuttering?
tony16v
20-10-2005, 15:30
no not on the williams mate.... on the turbo.

yeah, still having that cold misfire problem... but like you stay most parts have already been replaced...
Zollo
20-10-2005, 15:42
Nice, the turbo has risen!

Post some pictures in the media section mate :twisted:
clowo16v
20-10-2005, 20:46
Mine failed on the CO2 emissions and it was the lambda sensor. They should be able to test the lambda sensor aswell should be about 0.99-1.03 I think.

See ya

Matt
tony16v
21-10-2005, 09:25
Yeah the lambda reading was 0.95 and it should have 0.97 to 1.03.....

It passed the CO2 at natural idle but not at fast idle like 2500rpm...
clowo16v
21-10-2005, 11:45
Thats the problem then dont buy one from Renault though its about £200. I got one from a normal auto parts shop for about £60.

See ya

Matt
tony16v
21-10-2005, 12:20
cheers for your help mate...
Anders
21-10-2005, 14:41
Mine had same problem on lst test too.

A new lambda sensor sorted it out. Nick Hill does em and they are better than OEM ones.