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Discussion in 'Chevy Trucks' started by Gmgbo, Jan 22, 2009.

  1. Gmgbo

    Gmgbo Senior Member
    Messages: 159

    I have a 1986 k20 350 carb. It failed emissions at an idle, but passed when they reved it up. When i changed the cap and rotor I noticed the distributer was loose which explained why it was running so bad. Now that I have adjusted the timing and tightened it, do you think it will pass?
  2. Milwaukee

    Milwaukee 2000 Club Member
    Messages: 2,180

    try put alcohol in gas tank

    that should help you pass it.
  3. Sydenstricker Landscaping

    Sydenstricker Landscaping PlowSite Veteran
    Messages: 3,882

    Here is what I did to pass my old K20: Change the oil first and foremost. This will help capture and dirt/particulates better than old oil will. Make sure it is tuned up good!!! Put some 93 octane in and drive that SOB down the freeway getting it good and warmed up. Then go directly to the e-rip off place. Should pass just fine then!!! Mine did with no cats, true duals, all emission crap removed, etc. That was a 1984 K20 350 carbureted
  4. Gmgbo

    Gmgbo Senior Member
    Messages: 159

    OK ill try that....any other input?
  5. BigDave12768

    BigDave12768 PlowSite.com Addict
    Messages: 1,446

    Yeah go to Auto Zone and buy a botttle of Pass it. and follow directions it works.
  6. sechracer

    sechracer Senior Member
    Messages: 478

    find a small repair shop that does inspections and have them do it. usually dont put sniffers on older trucks. Atleast not around here.