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Vapor Canister Question

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by stump_puller, Sep 6, 2003.

  1. stump_puller

    stump_puller 1/2 ton status

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    I am currently putting my truck back together and I need to know if I can elimnate the vapor canister. The only hose currently goin to it is the one that seems to go back to the gas tank. Can I just plug it off or what? /forums/images/graemlins/1zhelp.gif

    Thanks in advance,
    Don
    /forums/images/graemlins/truck.gif

    P.S. By the way it is a '85 with a 350, performer rpm intake and an edlebrock 600cfm carb
     
  2. Shaggy

    Shaggy 3/4 ton status

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    <font color="green"> The other hose goes to vaccuum on the carb. If you don't have emissions tests then you can just leave everything how it is. </font>
     
  3. sled_dog

    sled_dog 1 ton status

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    I removed mine, I'm gonna put a breather on the end of the gas tank line and it should be fine. My buddy kept going on about how I should remove it, that thing weighs like 5 pounds! I was like alright, pulled it out, it weighs like 1.
     
  4. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Whatever you do, make sure you don't plug off the line that goes to the tank.

    The vapor cannister is there for a reason. It allows your gas tank to "breathe" when the gas warms up throughout the day and starts to produce fumes. Fumes = pressure and when that pressure starts to build it needs somewhere to go. That's why most people run a vented gas cap, too.

    If you eliminate the vapor cannister, just make sure that the pressure is still able to get out of your gas tank.
     
  5. stump_puller

    stump_puller 1/2 ton status

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    Thanks, so I'll just extended the line up higher next to my axle breather hoses and put a small breather on it. Thanks everyone /forums/images/graemlins/thumb.gif.

    Don
    /forums/images/graemlins/truck.gif
     
  6. dyeager535

    dyeager535 1 ton status Premium Member

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    Only problem I have with the breather is condensation in the tank.

    I can't remember, do the gas caps allow air in, but not out, until internal tank pressure reaches the caps pressure rating?

    Was thinking of using an axle breather myself, but since I don't plan on taking this tank back down for 100,000 miles, I don't want water building up in there.
     

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