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Thread: Hard starting after warmed up

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    Default Hard starting after warmed up

    Hello, need some help I have an 84 m1008 6.2. I canít seem to get it started when warm unless I cycle the glow plugs. Cold or hot I have to cycle the glow plugs every time. Is there a cure for this? Tia

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    Crickets.....

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    Super Moderator Tinstar's Avatar
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    Sounds like a modified electrical system.

    A stock system operating properly will not cycle the glow plugs when engine is warm.
    The GP temp sensor will tell the GP card not to activate them.
    No wait light illumination either.

    Has the wiring been modified?
    Are you giving it any throttle while starting.
    Is the engine Turing fast enough during start?
    Etc.

    Pics are always welcome.
    1987 M1008A1 (2)
    1986 M1009
    1995 NF2D FloodLight/Kohler-Kubota Generator Set
    1992 M101A2 trailer (2)
    1987 M149A2 Water Buffalo (M149A1 Chassis)
    S-280 Shelter

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    The glow plug system has been modified to push button. any time I have to start it Turn key off hold glow plug button down count to 10-15 depress accelerator pedal to the floor release and crank
    turns over slowly and fires up. puff of black smoke and she is runnin.


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    running two optima red top batteries

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    I will try and upload a video later today

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    4 Star General NDT's Avatar
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    “Turns over slowly” is your problem

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    Super Moderator Tinstar's Avatar
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    Quote Originally Posted by NDT View Post
    “Turns over slowly” is your problem
    X2
    1987 M1008A1 (2)
    1986 M1009
    1995 NF2D FloodLight/Kohler-Kubota Generator Set
    1992 M101A2 trailer (2)
    1987 M149A2 Water Buffalo (M149A1 Chassis)
    S-280 Shelter

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    Super Moderator Tinstar's Avatar
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    Fully charge each battery separately, then do a load test.
    If they check out ok, you have a dying starter.
    1987 M1008A1 (2)
    1986 M1009
    1995 NF2D FloodLight/Kohler-Kubota Generator Set
    1992 M101A2 trailer (2)
    1987 M149A2 Water Buffalo (M149A1 Chassis)
    S-280 Shelter

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    4 Star General NDT's Avatar
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    Or bad connections. After cranking feel all the connections, if there is high resistance it will burn your hand, likely suspects are the barrier strip on the firewall and cable end terminals between the terminal and the cable strands.

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    Tinstar (09-22-2019)

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