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+--- Thread: MOT emissions fail data interpretation (/showthread.php?tid=37091)
MOT emissions fail data interpretation - balkan_bozo - 15-10-2018
Chaps, please help me with this table, may as well be Chinese.
Car's a 1.4, 107K miles. Just serviced, new spark plugs, oil, petrol and air filters, Redex oil and petrol additives. I have a new cat but it's from Eurocarparts and reading through the related posts, changing this probably won't help since it was cheap and probably not so cheerful.
I did gun the c**p out of it before it went in for the MOT, however it did then sit with the engine off for about 10 minutes before it was tested. Looking at the fast idle data, the CO after 2nd test appeared to have dropped. My question is - the 'actual value' is nearly twice over the limit which to me would ring alarm bells but I literally have no clue if this can be remedied by even more Redex or something like Forte which I've been reading about on this forum.
Pic of the emissions fail attached. Cheers :-)
RE: MOT emissions fail data interpretation - Toms306 - 16-10-2018
High CO without the others being high is usually down to a dodgy cat tbh. Those cheap cats need to be really hot to work.
RE: MOT emissions fail data interpretation - Frosty - 16-10-2018
I would say it's an issue with the cat, as tom said the cheap aftermarket cats do need to be really hot to get the CO into the limit. It maybe worth putting the new one though to try and get it to go through.
RE: MOT emissions fail data interpretation - balkan_bozo - 27-10-2018
It was the cat. The new Eurocarparts cat got it through the MOT. Thanks chaps
RE: MOT emissions fail data interpretation - RetroPug - 28-10-2018
From my limited experience cheap pattern cats do tend to work when new, but they don't always last for many years. If you're just trying to keep it going for a bit longer they can be OK.