Most liked posts in thread: 09 MCS has code P1497 and misfire.

  1. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member

    Jul 31, 2009
    11,305
    6,277
    113
    Male
    Ratings:
    +8,070 / 10 / -3
    #3 MCS02, Jul 30, 2018
    Hi @yajing welcome to MA!

    The N14 engine does have a problem with carbon build up on the intake valves due to it being a direct injection engine and the way the PVC system was designed. Change the oil every 5000 miles no longer will help. But you will have to have it blasted every so often. I believe its around 50,000 miles. give or take a little.
    At 60k I would think your car does need it done. I does cause different odd codes, will this fix it? cant say for sure but as the carbon build up gets worse the car will run worse and eventually quit running. It can even lead to a rebuild. I would have it done.
     
  2. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member

    Jul 31, 2009
    11,305
    6,277
    113
    Male
    Ratings:
    +8,070 / 10 / -3
    #5 MCS02, Jul 30, 2018
    Yea, The Helmet will be getting this done soon!
     
  3. Dave.0

    Dave.0 Helix & RMW Powered
    Lifetime Supporter

    May 4, 2009
    25,021
    13,497
    113
    Burbs of Philly, PA
    Ratings:
    +14,644 / 10 / -4
    #4 Dave.0, Jul 30, 2018
    Invest in walnut futures on the NYSE.
     
    • Like Like x 1
    • Funny Funny x 1
    • List
  4. wmwny

    wmwny Well-Known Member

    May 29, 2009
    4,048
    2,246
    113
    Male
    Retired
    Piqua, Ohio
    Ratings:
    +2,810 / 10 / -0
    #2 wmwny, Jul 30, 2018
    Last edited: Jul 30, 2018

    Welcome to M/A! :Thumbsup:

    I have generation 1 MINIs and cannot help you but there are plenty of folk here who might have knowledgeable suggestion or two. I HAVE heard of the walnut treatment and those turbos seem prone to carbon buildup.

    Good luck!