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Thread: Wait to Start Light Blinking after start.

  1. #1
    Join Date
    Apr 2007
    Location
    Chicago
    Posts
    40

    Default Wait to Start Light Blinking after start.

    Driving this weekend my Wait to start light started to blink after the engine started to run. I would blink three times and then go out. I searched the forum and could not find any thing on this problem. What is the engine trying to tell me?
    1999 Suburban 2500 6.5TD Chicago, IL

  2. #2
    Join Date
    Apr 2001
    Location
    Newberg Oregon
    Posts
    12,293

    Default

    Most of these do.
    My 94 will do it a couple times quickly after the initial glow time.
    As long as the sucker does not stay on too long or keep on blinking its fine.
    The old 6.2's would cycle several times after the initial start up.
    This was done to reduce smoke during the first few minutes of run time.

    You generally see this more when the weather is cold on the later trucks.

    Hope this helps

    Robyn
    (1) 1995 Suburban 2500 4x4
    (1) 1997 Astro
    (1) 2005 Suburban (Papa Smurf)
    THIS IS BOW TIE COUNTRY

  3. #3
    Join Date
    Feb 2000
    Location
    Michigan
    Posts
    365

    Default

    Don't worry, this behavior is normal. The PCM pulses the glow plugs briefly after the engine starts to keep the tips hot and engine firing smoothly. Colder temps results in longer pulse times.
    2016 GMC SLT 2500 CC 4x4 Duramax All Terrain 59K
    1995 GMC 2500 EC 4x4 6.5TD,236K,Custom Tuning,HX40W-II turbo,Amsoil Bypass Filter,KD Exhaust,FSD Cooler,KD Headlight booster,Hi-cap Cooling
    TDP member #14

  4. #4
    Join Date
    Jun 2006
    Location
    St. Albans, WV
    Posts
    368

    Default

    Yeh, they usually refer to this as "afterglow". It's normal.
    96 Suburban K2500 6.5L TD. High miles and daily driven (for now). Remote mount FSD with cooler, Turbo Master/Boost fooler, 4" Jardine turbo back exhaust, 2.5" cross-over pipe, Boost, EGT, & Tranny temp gauges, working on more.

  5. #5
    Join Date
    Apr 2007
    Location
    Chicago
    Posts
    40

    Default

    Thanks for the help.
    1999 Suburban 2500 6.5TD Chicago, IL

  6. #6

    Default that answered my qustion too

    I was wondering if that was the case. This forum is great!
    thanks!

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