Engine Drivetrain 2nd Gen S Most liked posts in thread: Stalling in the morning

  1. Nathan

    Nathan Founder

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    #2 Nathan, May 15, 2012
    Any codes?
     
  2. yardofbeef

    yardofbeef New Member

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    #3 yardofbeef, May 15, 2012
    No CEL or anything - and haven't got a code reader available yet. Will look into this.
     
  3. bluefox280

    bluefox280 New Member

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    #4 bluefox280, May 15, 2012
    Grab hold of a OBDII scanner and read the ECU to see what codes are present.

    Second, does it only hard-start and stumble when the engine is cold?
    If so, typically, the Coolant Temperature Sensor (CTS) could be to blame.

    - Erik
     
  4. SacredDisorder

    SacredDisorder Because Race Car?
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    #5 SacredDisorder, May 21, 2012
    I know there was some issues with moisture building up in the intake manifold. Could be a culprit.
     
  5. grodenglaive

    grodenglaive New Member

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    #6 grodenglaive, May 21, 2012
    That's the exact symptoms of a failing high pressure fuel pump, which many (all?) R56 goes through. Time to visit the dealer:)
     
  6. mini52

    mini52 New Member

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    #7 mini52, May 30, 2012
    I've also got a 2007 MCS that just started showing these symptoms two weeks ago. Last month I had it in the dealer for a recall item and had them clean the carbon from the intake (the walnut shell thing) while the car was there. The rough running I had been experiencing went away and my oil consumption went way down as well. I didn't think the starting issue was related to the cleaning so I took my car to a local shop. Since the problem was intermittent, it of course didn't show anything at the shop except for some misfire codes. From what I've read, this has all the hallmarks of a failing high pressure fuel pump.
     
  7. rum4

    rum4 Club Coordinator
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    #8 rum4, May 30, 2012
    I know mine is 12 but the thermostat was bad in mine and it caused hard starts and rough idling in the morning til I got it fixed