2nd Gen R56 Cooper Most liked posts in thread: Misfire after warm up Please help

  1. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member

    Jul 31, 2009
    11,308
    6,278
    113
    Male
    Ratings:
    +8,073 / 10 / -3
    #2 MCS02, Jun 16, 2016
    Welcome to MA! Sorry I can't help I am a gen1 guy, but one of our gen2 guys will be along soon that a
    Can help
     
  2. fishkey

    fishkey New Member

    Jun 16, 2016
    7
    0
    0
    Florida
    Ratings:
    +0 / 0 / -0
    #3 fishkey, Jun 16, 2016
    Many thanks

    Hey thanks for the Welcome:Thumbsup:
     
  3. wmwny

    wmwny Well-Known Member

    May 29, 2009
    4,048
    2,246
    113
    Male
    Retired
    Piqua, Ohio
    Ratings:
    +2,810 / 10 / -0
    #4 wmwny, Jun 16, 2016
    Welcome to M/A! Sorry, as an owner of 3 Gen 1 MINIs, I cannot help you either, but there are a lot of Gen 2 members here who can and will be of help.
     
  4. mrntd

    mrntd Well-Known Member
    Supporting Member

    Sep 30, 2011
    5,083
    1,762
    113
    Male
    Sales and Marketing manager
    Hilliard, Ohio
    Ratings:
    +1,763 / 0 / -0
    #5 mrntd, Jun 17, 2016
    Welcome Aboard!
    I too have a gen 1 but I'll try to help anyway.

    If you run hard when it's warm is it okay? If so then it sounds like your not getting fuel. That could be anything from clogged injectors, dirty fuel filter, or bad pump.
    Was the code for the same cylinder after you changed plugs and coils?
     
  5. 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
    #6 Dave.0, Jun 17, 2016
    Welcome to MA. Where are you located?

    Because you may have very bad Carbon build up on the back of the valves that may need cleaned by a Walnut Blasting.

    You just have to find someone (besides the Stealership) that has the tools to do it and they are much cheaper than the Stealership.
     
  6. fishkey

    fishkey New Member

    Jun 16, 2016
    7
    0
    0
    Florida
    Ratings:
    +0 / 0 / -0
    #7 fishkey, Jun 17, 2016
    misfire

    Yes MRNTD when you're on the throttle it seems fine, And the misfire reads in the same cylinder #3. Do you think I should swap injectors before purchasing one?
    Still gett p2187 code too lean @ idle
    I will get a fuel filter and try that.
    I though the carbon buildup thing was with the turbo models on exhaust valves. Thanks Dave.O

    In the morning when cold its starts fine, runs fine 3 minutes later after something warms up it misfires. Is it possible the Crank position Senor is the culprit?
     
  7. ZippyNH

    ZippyNH Well-Known Member

    Jan 25, 2010
    1,404
    688
    113
    Pilot
    Southern NH
    Ratings:
    +688 / 0 / -0
    #8 ZippyNH, Jun 17, 2016
    Yeah...carbon should only be an issue on the DI cars, aka TURBO....
    But the thought that there might be a hotspot in the cylinder, like carbon, causing the pre-ignition might have merit....
    Plug looks ok? Any chance you tried a compression check?
    Usually compression goes UP as a motor warms up, masking issues, likewise with higher rpms..worn clearances tighten up...
     
  8. fishkey

    fishkey New Member

    Jun 16, 2016
    7
    0
    0
    Florida
    Ratings:
    +0 / 0 / -0
    #9 fishkey, Jun 17, 2016
    misfire

    Zippy thanks for the insite. Haven't tried compression check yet, guess i need to borrow a tester.
    Number 3 plug did have more carbon on it when I pulled the plug. Cleaned it in my media blast cabinet. Then switched it, same problem.. also tried coil swap.
    Why would the carbon build on just one cylinder?
     
  9. Metalman

    Metalman Well-Known Member
    Lifetime Supporter

    Sep 29, 2009
    12,731
    7,688
    113
    Ex-Owner (Retired) of a custom metal fab company.
    Columbus, Ohio
    Ratings:
    +7,960 / 1 / -0
    #10 Metalman, Jun 17, 2016
    The fuel injector is supposed to spray the fuel in a very fine mist in order to get good complete combustion. The problem might be caused by a buildup around the injector, you might be getting incomplete combustion. Your injectors may need to be cleaned or replaced.

    [​IMG]
     
  10. fishkey

    fishkey New Member

    Jun 16, 2016
    7
    0
    0
    Florida
    Ratings:
    +0 / 0 / -0
    #11 fishkey, Jun 17, 2016
    misfire

    Thanks Metalman :cornut::mtrn:
     
  11. Metalman

    Metalman Well-Known Member
    Lifetime Supporter

    Sep 29, 2009
    12,731
    7,688
    113
    Ex-Owner (Retired) of a custom metal fab company.
    Columbus, Ohio
    Ratings:
    +7,960 / 1 / -0
    #12 Metalman, Jun 17, 2016
    Gack..... You "Motor On'd" me?????
     
  12. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member

    Jul 31, 2009
    11,308
    6,278
    113
    Male
    Ratings:
    +8,073 / 10 / -3
    #13 MCS02, Jun 17, 2016
    :lol::lol::lol::lol::lol: He's new. fishkey, Just for the recored "Motor On" is................well...........a polite way saying what you really mean.:biggrin5:
     
  13. ZippyNH

    ZippyNH Well-Known Member

    Jan 25, 2010
    1,404
    688
    113
    Pilot
    Southern NH
    Ratings:
    +688 / 0 / -0
    #14 ZippyNH, Jun 17, 2016
    +1
    :postcount
    I'm sure once they finds the REAL meaning if it, she may do a spit-take....
    IF I didn't know the background of it, it would be easy to imingine it as a "hi-5" type of thing!!!
     
  14. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member

    Jul 31, 2009
    11,308
    6,278
    113
    Male
    Ratings:
    +8,073 / 10 / -3
    #15 MCS02, Jun 18, 2016
    I made that mistake myself :lol:
     
  15. Goldsmithy

    Goldsmithy MINI Alliance Ambassador
    Articles Moderator Supporting Member

    Jan 30, 2015
    1,748
    982
    113
    Male
    TCB
    Main Street in the land of Oz
    Ratings:
    +1,151 / 0 / -0
    #16 Goldsmithy, Jun 18, 2016
    Learn something new every day...:)
     
  16. melissa26m

    melissa26m New Member

    May 17, 2016
    69
    0
    0
    Ratings:
    +0 / 0 / -0
    #17 melissa26m, Jun 18, 2016
    Just had this exact same problem with mine.... (2010 clubman 59k "justa) Codes it threw we're bad coil... Thermostate was stuck (which was replaced 6 mo ago) and it threw and 02 sensor code. I did end up changing out plugs as you did (also no help) I did end up with one new coil and new thermostat the 02 sensor code cleared itself when everything else was fixed. Total repair cost $650 at a very trusted shop. However they broke my grill but that's another story.


    #kcco. [emoji594]
     
  17. melissa26m

    melissa26m New Member

    May 17, 2016
    69
    0
    0
    Ratings:
    +0 / 0 / -0
    #18 melissa26m, Jun 18, 2016


    Let's talk gas.... What are you putting in it???


    #kcco. [emoji594]
     
  18. fishkey

    fishkey New Member

    Jun 16, 2016
    7
    0
    0
    Florida
    Ratings:
    +0 / 0 / -0
    #19 fishkey, Jun 18, 2016
    misfire

    Sorry Metalman MY Bad.... Newbie mistake:cryin:
    INland 92 octane gas
    Melissa26m Thermostat kinda makes some sense since misfire occurs upon warmup. I'am out of town this weekend when i get back home on Monday it's back to the garage to try out advice given.....
    Thanks everybody
     
  19. melissa26m

    melissa26m New Member

    May 17, 2016
    69
    0
    0
    Ratings:
    +0 / 0 / -0
    #20 melissa26m, Jun 18, 2016


    Yah mine was stuck open and my clubby is a diva. She is very specific on gas. She's only fond of Chevron highest octane... But when mine was idling rough and I turned on the A/C it got so much worse.... The thermostat was about 250$ but she's running like a champ now. The only indicator that came on way my check engine that would intermittently blink depending on RPM and she was gutless....

    Hope it's an easy fix and you are back on the road soon.



    #kcco. [emoji594]
     
  20. RallyMini370

    RallyMini370 Well-Known Member

    Mar 12, 2012
    1,970
    1,586
    113
    Engineer
    Central America
    Ratings:
    +1,587 / 0 / -0
    #21 RallyMini370, Jul 15, 2016
    Welcome to MA, I saw misfire and I was hooked! LOL(regular members know the joke) I hope the thermostat fixes it.