Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

All you guys with vacuum leak symptoms

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Can Can, Jun 12, 2003.

  1. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,555
    Likes Received:
    156
    Location:
    Cochrane, Alberta, Canada
    I've been struggling to find a minor vacumm leak for the last few months. I'm happy to report that I finally found it!!!!

    If any of you guys have a vacuum leak symptoms that are puzzling you, I would suggest that you check your vacuum advance. I checked and re-checked all my vacuum lines multiple times only to find by accident that the diaphragm in my vacuum advance pod was either sticky or punctured. To make a long story short, 20 minutes under the hood gave me a new vacuum advance and no more vacuum leak symptoms.

    Here's a question- What exactly is the vacuum advance diaphragm made of? And what would cause it to puncture or get sticky?

    Anyhow, maybe this will help one of you out there.
     
  2. blasterD

    blasterD 1/2 ton status

    Joined:
    May 24, 2003
    Posts:
    410
    Likes Received:
    0
    Location:
    Anchorage Alaska
    Most are made of rubber. How old was your old vaccum advance? They can get old and dry-rot or crack. It probably wasn't punctured just deteriorated.
     
  3. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,555
    Likes Received:
    156
    Location:
    Cochrane, Alberta, Canada
    AFAIK, the vacuum advance is factory, so it's conceivable that the sucker was nearing 20 years old.

    Thanks for the info, brother!!
     
  4. bryguy00b

    bryguy00b 3/4 ton status

    Joined:
    Apr 7, 2002
    Posts:
    5,587
    Likes Received:
    0
    Location:
    Rochester, N.Y
    hmm i should look at that..mine has a leak and you can hear it..when i mash the pedel..it will take a second to kick in..
     
  5. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    Vacuum advance? Oh yeah, that was used back when vehicles also had fuel delivery devices that utilized some of the same "technology" as a toilet tank. /forums/images/graemlins/shocked.gif /forums/images/graemlins/wink.gif /forums/images/graemlins/eek.gif /forums/images/graemlins/rotfl.gif
     

Share This Page