MOT CO Emissions too high

  1. Saxperience Post Whore Joined: Aug 2010 Little Mill, South Wales Posts: 7547 Mondeo ST TDCI Saxo VTS
    #1
    My MOT failed last week due to CO emissions being too high. The Lambda and Hydrocarbons were fine.

    It has only had a cat on a few days and is barely driven.

    It is booked back in tomorrow and I want to make sure it passes.

    I have changed plugs, filter and put redex through the system.

    Is there anything specific to the CO that I can do to make sure it's ready and increase pass chances?
  2. Super Moderator Joined: Nov 2009 Cambridge(ish), UK. Posts: 10581 BMW 5x M50d.
    #2
    was it a cheap cat? They're often just not up to the job. Unfortunately the most likely culprit with CO is the cat. :/
  3. Saxperience Post Whore Joined: Aug 2010 Little Mill, South Wales Posts: 7547 Mondeo ST TDCI Saxo VTS
    #3
    Quote:
    Originally Posted by Ross View Post
    was it a cheap cat? They're often just not up to the job. Unfortunately the most likely culprit with CO is the cat. :/
    Well it's off a members system but don't think it's been through MOT with it on for a while now #dodgyc*nt.

    I think if it fails again I will get them to price me up a cat and get them to fit it as it's an exhaust place anyway. I do intend to get the cat really hot before going in as it will go straight on the rollers and see if that makes a difference.
  4. Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182
    #4
    yeah getting it really really hot too should be of help
  5. L-plater Joined: Nov 2014 Posts: 68
    #5
    i always run a can of this through my petrol cars before mots really good stuff in my opinion
    http://www.ebay.co.uk/itm/Wurth-Petr...YAAOSw~OdVVxJJ