Question Engine R55 Clubman 100K+ Most liked posts in thread: Misfire at Idle Has me Stumped!

  1. Rob-GA

    Rob-GA New Member

    Jun 1, 2022
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    #6 Rob-GA, Jun 2, 2022
    Last edited: Jun 2, 2022
    Not an S. It's an N12 base model. I should have specified that! I edited the original post to include the engine type.
     
  2. MCS02

    MCS02 Moderator
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    #2 MCS02, Jun 1, 2022
    If this is an S with the N14 motor it may need to have the intake valves walnut blasted. On the S with the turbo they are bad about building up carbon on the intake side. They can do it in as little as 35-40k.
    is it an S?
     
  3. Metalman

    Metalman Well-Known Member
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    #5 Metalman, Jun 2, 2022
    My guess it's a non-S because of the comment of 54 psi.....
    Non-S gets the valves cleaned with fuel contact, so shouldn't have carbon buildup issues ....
    OP should post the engine type or it's going to be a guessing game...

    The S has 2 fuel pumps..... LPFP in the tank, and a HPFP mounted on the head....
    LPFP runs at about 5 bar (73 psi)
    HPFP runs at about 50 bar (725 psi) at idle and 120 bar (1,740 psi) at WOT....

    Need more info....
     
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  4. MCS02

    MCS02 Moderator
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    #3 MCS02, Jun 1, 2022
    Welcome to MA!
     
  5. 00Mini

    00Mini Well-Known Member

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    #4 00Mini, Jun 2, 2022
    Nice catch on the intake valves. That’s why you get the big bucks. :rolleyes::D
     
  6. 00Mini

    00Mini Well-Known Member

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    #7 00Mini, Jun 2, 2022
    Welcome to Motoring Alliance