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2003 Merc 5.0l issue

Discussion in 'Engines, Drives, Props, etc.' started by Jevon Jamieson, Sep 3, 2017.

  1. Jevon Jamieson

    Jevon Jamieson Member Founding Member

    24
    10
    Jul 30, 2017
    Rogers, AR
    2013 Cobalt 242
    Volvo 6.0L 380hp
    2012 F150 Lariat 4x4
    Coming back from castle cove at 30mph a two beep alarm started. It only beeped every few minutes. No loss of power and all gauges reading good. I throttled down and shut it off to open the engine bay. All looked ok. It wouldn't start! I finally got it going and it ran fine but alarm still beeped. When I got to PCM it would not idle and would not restart. I finally got it going but had to literally hand walk it into the slip.
     
  2. thunder550

    thunder550 Well-Known Member

    101
    54
    Aug 14, 2017
    Scottsdale, AZ
    1995 Cobalt 252
    502 Mag EFI
    2017 GLE43
    Idle air control? If it dies with the throttle closed but will start and stay running with the throttle cracked a bit that's my bet.
     
    Walt P and Tonka Boater like this.
  3. Jevon Jamieson

    Jevon Jamieson Member Founding Member

    24
    10
    Jul 30, 2017
    Rogers, AR
    2013 Cobalt 242
    Volvo 6.0L 380hp
    2012 F150 Lariat 4x4
    I have one order! Thank you for the confirmation.
     
    thunder550 likes this.
  4. Tonka Boater

    Tonka Boater Site Owner Staff Member

    191
    101
    Jul 10, 2017
    Wayzata, MN
    1997 Cobalt 232
    502 MAG / Bravo I
    2016 Yukon Denali
    Yep, I would have guessed IAC too.
     
  5. Jevon Jamieson

    Jevon Jamieson Member Founding Member

    24
    10
    Jul 30, 2017
    Rogers, AR
    2013 Cobalt 242
    Volvo 6.0L 380hp
    2012 F150 Lariat 4x4
    I replaced the IAC and vrmmm vrmmm. We are good to go.
     
    Tonka Boater, Walt P and thunder550 like this.
  6. thunder550

    thunder550 Well-Known Member

    101
    54
    Aug 14, 2017
    Scottsdale, AZ
    1995 Cobalt 252
    502 Mag EFI
    2017 GLE43
    Nice!
     
  7. Tonka Boater

    Tonka Boater Site Owner Staff Member

    191
    101
    Jul 10, 2017
    Wayzata, MN
    1997 Cobalt 232
    502 MAG / Bravo I
    2016 Yukon Denali
    That's great! Thanks for reporting back and letting us know.
     

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