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vacum chaos i need help

Discussion in 'The Garage' started by TC4x4, Sep 17, 2006.

  1. TC4x4

    TC4x4 1/2 ton status

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    I am replacing my carburator and am wondering if i have to keep the coffee can like thing in my 84 blazer, it has all thoes black tubes running from it which i think are the vacum can i take that stuff oout and unclutter my engin or what?

    Thanks the Mule
     
  2. ssped

    ssped 1/2 ton status GMOTM Winner

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    It is a vaccume reservoir. I think mostly for the AC blend door operation.
     
  3. Rescuedad77

    Rescuedad77 Registered Member

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    I had an 81 blazer and took out the a/c and those vaccum lines and it ran fine.
     
  4. dyeager535

    dyeager535 1 ton status Premium Member

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    Coffee can shape piece is EVAP.

    You can remove it, although it's illegal and costs nothing in power, if anything it may help economy a hair.

    The critical part is the tank vent line. You've got to vent the gas tank somehow, venting it in the engine bay IMO is a bad idea.
     
  5. ssped

    ssped 1/2 ton status GMOTM Winner

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    the thing that looks like a coffee can is not evaps. it is only a reservoir for holding a constant vacume pressure. there is a charcoal canister in there also but it has multiple
     
  6. ssped

    ssped 1/2 ton status GMOTM Winner

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    the thing that looks like a coffee can is not evaps. it is only a reservoir for holding a constant vacume pressure. there is a charcoal canister in there also but it has multiple larger lines and a
     
  7. ssped

    ssped 1/2 ton status GMOTM Winner

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    the thing that looks like a coffee can is not evaps. it is only a reservoir for holding a constant vacume pressure. there is a charcoal canister in there also but it has multiple larger lines and only one vacume line to the solenoid. usually down by the front bumper if I remember.
     
  8. dyeager535

    dyeager535 1 ton status Premium Member

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    AFAIK EVAP cannister is mounted to the drivers side of the core support. Poster will have to clarify which piece/location he is talking about. I've never seen a vacuum reservoir on the trucks, (cars were round though) doesn't mean they don't exist. :)
     
  9. ssped

    ssped 1/2 ton status GMOTM Winner

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    the vaccume reservoirs used to look exactly like a coffee can untill they went to the 4" round plastic ball type.
     

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