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  1. #1
    Join Date
    Sep 2000
    Location
    California
    Posts
    93

    Default 6.2L Glow Controller Issue

    I've been running the '85-newer style glow controller on my 6.2L along with a resistor to increase the glow times (for use with the AC 60G glow plugs) and all has been great. In warmer weather when it's over 95 degrees outside or so, sometimes the glow plugs do not cycle for a warm restart and that sometimes causes harder starts. Anyone have an idea why the plugs might not be cycling in hot weather? I'm not running one of those inhibit switches that prevent the glow plugs from cycling when the coolant temp is over 125. Could it be a failing controller?
    Bob

    '83 K2500, 6.2L J-code, NV4500, NP208, 3.73 gears

  2. #2
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,399

    Default

    No, it's working as advertised. The 85+ (OEM or aftermarket clone) controller has a temp switch on-board. A heat-soaked engine compartment during summer may prevent a glow cycle. Simply, it doesn't cool down fast enough. It's easy enough to just bypass it with a cheap Ford starter relay and momentary switch.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    Sep 2000
    Location
    California
    Posts
    93

    Default

    Oh, gotcha. I know some 6.2Ls don't need the glow plugs to start when it's warm/hot, but some do, and, unfortunately, mine is one of those. Maybe I'll look into the momentary button. I had thought going to the '85-newer setup would be the final glow plug modification I'd need to do.

    Thank you for the information. Appreciate it.
    Bob

    '83 K2500, 6.2L J-code, NV4500, NP208, 3.73 gears

  4. #4
    Join Date
    Aug 2019
    Location
    Joliet, Illinois
    Posts
    29

    Default

    Echoing the previous reply, the controller bypass is wonderful and easy to get wired up. In my opinion it's better than any controller because it puts you in complete control of when and how much glow you use in any given situation.
    1983 Chevrolet C20

    1923ish Ford Model T Touring

    2000 Lincoln Town Car

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