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De-Smog Help

Discussion in '60-Series Wagons' started by HitTheDirt, Aug 26, 2017.

  1. HitTheDirt

    HitTheDirt SILVER Star

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    Ah that's right, you mentioned that before. Will switch that tonight
     
  2. HitTheDirt

    HitTheDirt SILVER Star

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    OK thanks, was wondering what that was and where it went. So the other drivers side evap hose further outboard is a vac line then?
     
  3. HitTheDirt

    HitTheDirt SILVER Star

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    Ok new issue, it appears my truck only came with one 4 point VCV. Can I use just one and rout the original purge line to the carb insulator base? It's the u shaped hose in the pic, coming off the firewall from the vent control valve on the charcoal canister. My canister has an electrical control on the vent control valve. Do I still need vacuum from the BVSV then??

    Then I can just use one VCV for the distributor circuit?

    IMG_6763.JPG

    IMG_6764.JPG
     
    Last edited: Sep 13, 2017
  4. HitTheDirt

    HitTheDirt SILVER Star

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    Ok I am an idiot. I found my "missing" VCV on the underside of my air cleaner. Progress continues..

    IMG_6765.JPG
     
  5. peterabbitcook

    peterabbitcook

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    Have a close look at the emissions manual.
    One of the carb evap hoses is for fuel vapor to get adsorbed into the canister when the ignition is switched off - the VCV for this circuit fails open (switch power closes the valve). Make sure you hear it clicking when you switch the ignition on/off. This VCV sits near your canister, fat hoses go to the firewall and canister.
    The other carb evap hose is for fuel vapor to get pulled from the canister and burned when the vehicle is warmed up and in motion. The VCV for this circuit is actuated through a BVSV so that it only pulls vapor when the engine is warmed up and the throttle plate is above the advancer port. IF I remember correctly this VCV sits on/near the driver side of the hood - fat hoses go to the firewall and base of the carb, 1 skinny vacuum line to BVSV 1, 1 skinny vacuum line to air cleaner.

    Chase the hard lines on the firewall back to the canister and make sure their hoses are connected in the right positions.
     
  6. HitTheDirt

    HitTheDirt SILVER Star

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    She's alive!! Thanks for all the help!
     
    mwebfj60 and UGA2018 like this.
  7. UGA2018

    UGA2018

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    Enjoy her!! Nice work!
     
  8. HitTheDirt

    HitTheDirt SILVER Star

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    Oops somehow I disconnected the carb fan. Time to investigate!