1999 Mack CH613 engine problems

Discussion in 'Mack Forum' started by Underhill, Nov 7, 2017.

  1. Underhill

    Underhill Bobtail Member

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    Nov 7, 2017
    0
    When truck is running the engine acts like you are turning the ignition switch on and off. Does't do it all the time. Lightning bolt comes on and off. Any help would be appreciated took it to Dealership they could not find the problem because it does not malfunction all the time,
     
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  3. dumptruck89

    dumptruck89 Light Load Member

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    Feb 27, 2015
    MA
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    Did you check the battery cables and connections to the ecm? A bad connection could cause what your saying.
     
  4. 6wheeler

    6wheeler Road Train Member

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    Aug 30, 2009
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    I have the same truck. Common problem is the plastic gear that runs the fuel pump is breaking down. And another common problem I have is getting water in the fuel. Pay no attention to the lighting bolt. Its been coming on for 10 years for me.
     
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