2nd Gen R56 Cooper Car stumble, misfire

Discussion in '2nd Generation: 2007+ R55 through R61' started by Gymrat2, Feb 6, 2017.

  1. Gymrat2

    Gymrat2 New Member

    Feb 3, 2017
    7
    0
    0
    Ratings:
    +0 / 0 / -0
    Hi everyone. I'm new to the forum. From Toronto Ontario.

    I have a 2010 mini, non turbo. For a few months now the check engine light would periodically come on and turn off the next day. A few stumbles would happen just before the light came on. I took it to a mini service station and they ended up changing the VANOS. Then within a three days of that fix the stumbling starts again but this time it's complete lost of power and feels like it's in the wrong gear kind of stumble. The check engine light flashes and doesn't stay on. No if I drive it in sport mode or in M mode it drives fine. Seems to only happen at half throddle from 900rpm to 2800rpm. To me it seems like a misfire. Everyone's experience with this thing would help. Especially if I can complete the work myself.

    Sent from my SM-G530W using Tapatalk
     
  2. wmwny

    wmwny Well-Known Member

    May 29, 2009
    3,579
    1,823
    113
    Retired
    Piqua, Ohio
    Ratings:
    +2,042 / 2 / -0
    Welcome to M/A! :Thumbsup:

    I cannot help you as I have Generation 1 MINIs, but there are plenty of others here who can and will offer advice. Good luck! :fingerscrossed:
     
  3. mrntd

    mrntd Well-Known Member
    Supporting Member

    Sep 30, 2011
    5,079
    1,759
    113
    Male
    Marketing manager
    Hilliard, Ohio
    Ratings:
    +1,760 / 0 / -0
    It sounds like an ECU problem. Or a sensor pick up to the ECU.
    I had a car act just like that but that was in the carbureted days and it was the acceleration pump. Today that's all controlled by the ECU
     
  4. Metalman

    Metalman Well-Known Member
    Lifetime Supporter

    Sep 29, 2009
    12,549
    7,423
    113
    Owner of a small custom metal fabrication company,
    Columbus, Ohio
    Ratings:
    +7,435 / 0 / -0
    #4 Metalman, Feb 7, 2017
    Last edited: Feb 7, 2017
    You might want to check the throttle body...

    It sits low on the intake manifold if I recall correctly...

    Very possibly it could have oil buildup from the EGR system, possible messing with the air flow through that unit...

    You might be surprised how much oil would be sitting inside that part... Worth pulling it and doing a thorough cleaning...

    Throttle.JPG

    [​IMG]
     
  5. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member Supporting Member

    Jul 31, 2009
    9,458
    5,051
    113
    Male
    Ratings:
    +5,680 / 6 / -0
    Welcome to MA!
     
  6. 00Mini

    00Mini Well-Known Member

    Feb 24, 2013
    14,015
    616
    113
    Retired
    Ratings:
    +755 / 2 / -0
    Welcome to Motoring Alliance the best MINI forum on the interweb !!
     
  7. Gymrat2

    Gymrat2 New Member

    Feb 3, 2017
    7
    0
    0
    Ratings:
    +0 / 0 / -0
    Update:
    We'll the engine light is off and the it stopped stumbling. Running like a dream. I wonder if the fact that my wife drives it in the city everyday (stop and go, light to light) has anything to do with it. This week I've been driving at a steady higher speed on the highway to work and back, maybe this clean out whatever **** been causing it.

    Sent from my SM-G530W using Tapatalk
     
  8. Gymrat2

    Gymrat2 New Member

    Feb 3, 2017
    7
    0
    0
    Ratings:
    +0 / 0 / -0
    I will do this despite that it's running good now.

    Sent from my SM-G530W using Tapatalk
     
  9. Metalman

    Metalman Well-Known Member
    Lifetime Supporter

    Sep 29, 2009
    12,549
    7,423
    113
    Owner of a small custom metal fabrication company,
    Columbus, Ohio
    Ratings:
    +7,435 / 0 / -0
    When you do.... Please post up some before pictures with your milage.... I'm sure Cooper owners would be interested in seeing what it looks like...
     
  10. Gymrat2

    Gymrat2 New Member

    Feb 3, 2017
    7
    0
    0
    Ratings:
    +0 / 0 / -0
    Good thinking. I will

    Sent from my SM-G530W using Tapatalk
     
  11. Gymrat2

    Gymrat2 New Member

    Feb 3, 2017
    7
    0
    0
    Ratings:
    +0 / 0 / -0
    Well took it to the mechanic and the valve cover gasket is leaking into the spark plug vally. Filled it up causing the coils on cylinder 1 and 2 to miss fire. They cleaned it out and still missing.
    So gaskets seals 4 plugs and 2 coil=$765 canadian. **** me. Two weeks ago they changed the camshaft solenoid=$600. What's next????
    Does this make sense to everyone? Or am I getting duped?

    Sent from my SM-G530W using Tapatalk
     
  12. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member Supporting Member

    Jul 31, 2009
    9,458
    5,051
    113
    Male
    Ratings:
    +5,680 / 6 / -0
    No. Not to me.
     
  13. Gymrat2

    Gymrat2 New Member

    Feb 3, 2017
    7
    0
    0
    Ratings:
    +0 / 0 / -0
    Oh well what's done is done. I should have taken pictures and will call the mechanic in the morning to send me some. When I arrived he had the spark plugs and coils for me to look at. I tell you the plugs were eroded pretty bad. Even the coils, oil had seeped up around the plug into the coil itself, and the rubber was pretty rotten too.
    We will see how it drives over the next few days.

    Sent from my SM-G530W using Tapatalk
     
  14. Gymrat2

    Gymrat2 New Member

    Feb 3, 2017
    7
    0
    0
    Ratings:
    +0 / 0 / -0
    Sorry for the late update everyone.
    Car stumbling problems are gone. No more check engine lights. But now there is a large ticking noise. Mechanic says it's normal but I doubt it. My research says it's either a timing chain tensioner or vacuum pump thing. Any input? I'll start another thread.

    Sent from my SM-G530W using Tapatalk
     

Share This Page