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Thread: Hard starting after warmed up

  1. #11
    4 Star General Barrman's Avatar
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    The 6.2 is an indirect injection engine. Any temperature below 150į is considered cold to this style of engine and glow plug use is needed. Keep that in mind once you get the batteries and starter right.
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  2. #12
    Sergeant Major Curtisje's Avatar
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    A few paragraphs from my 6.2 troubleshooting guide...

    20190922_120657.jpg

    20190922_120747.jpg
    James Curtis
    1984 M1008 CUCV Pick-up
    1985 M1028A3 Wrecker, Holmes 440
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  3. #13
    Sergeant Major Curtisje's Avatar
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    I also found this excerpt from a GM bulletin on another site;

    Some customer comments have been received regarding no cold start capability or hot restart difficulty during mid-range engine temperature. Cases of no cold start may be the result of the glow plug inhibit switch not operating correctly. Reference Corporate Service Bulletin #866001 for glow plug system diagnosis.* Meanwhile, cases of poor hot/warm engine startup may be the result of starting system degradation, and may require glow plug assistance for engine starting. Replacement of the existing glow plug inhibit switch with a new service switch without a coolant temperature sensor (listed below) win provide glow plug assistance upon engine start, regardless of engine coolant temperatures. This feature will not reduce glow plug life.

    Hope something here helps.
    James Curtis
    1984 M1008 CUCV Pick-up
    1985 M1028A3 Wrecker, Holmes 440
    M101A3 Utility Trailer
    M116 Generator Trailer

  4. #14
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    Iíll check them this week when the wife gets home. Thank you for the pointers.

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