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Vacuum Advance on 86K5? Where is it?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by MilpitasK5, Oct 11, 2003.

  1. MilpitasK5

    MilpitasK5 1/2 ton status

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    I wanna time my truck but don't know where it is. /forums/images/graemlins/crazy.gif
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    The vac advance is right on the distributor...look for the vacuum line. /forums/images/graemlins/smile.gif

    Rene
     
  3. MilpitasK5

    MilpitasK5 1/2 ton status

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    I saw it on other trucks... It has a canaster sticking out of the passenger side, right? Mine doesn't have that.
     
  4. paveslave

    paveslave Registered Member

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    Is your engine carburated or throttle body injection?
     
  5. MilpitasK5

    MilpitasK5 1/2 ton status

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    It's carbed.
     
  6. paveslave

    paveslave Registered Member

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    Do you know if this is the original distributor? A carburated engine should have a round diaphram housing on the side of the distributor. A throttle body engine doesn't have a vacuum advance. I'm unfamiliar with what was standard in '86.
     
  7. MilpitasK5

    MilpitasK5 1/2 ton status

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    I'm not sure if it's the original or not. /forums/images/graemlins/confused.gif
     
  8. imiceman44

    imiceman44 1 ton status

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    Hey wait, is yours an 86?
    It could be that Stupid ESC, electronic spark control, if so you have to short 2 pins on the computer harness under your dash and then time it.
    Talk to me on my Cell I will explain it better and I might even have a diagram for you from my haynes.
     
  9. dyeager535

    dyeager535 1 ton status Premium Member

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    CA truck it's probably full CCC...no mechanical OR vacuum advance if so.
     
  10. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Yep, I have an 85K5 with the wonderfull cali. smog equip. /forums/images/graemlins/rolleyes.gif You have a CCC and the ESC distributer.
     

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