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Emmisions

Discussion in 'Early CJ5 and CJ6 Tech' started by powerwagon67, May 7, 2006.

  1. May 7, 2006
    powerwagon67

    powerwagon67 Mile-Hi Ghostrider

    westminster Co
    Joined:
    Mar 31, 2006
    Messages:
    19
    Emmisions UPDATE!!!!!!!

    I took my 71 V6 for its test on Friday after tuning it up and the readings were super low and passed with flying colors but it failed because of visual smoke which only happens after it idles for a while and then smokes when you crack the throttle. I really don't think its oil but rather the carb loading up(really black). I have a free test if I take it back within 10 days. Does anyone have any ideas. Update! 5-16-06 Well I rebuilt the carb and went with smaller jets and installed valve stem seals and the black smoke was still there. I dug into the issue and I new it was simple because it didn't appear to smoke before! So I started the process of elimination and I tested the new distributor I had put in and sucked on the vacume advance hose and it had a serious leak in the vacume advance. Replaced and problem solved!:)
     
    powerwagon67, May 7, 2006
    #1
  2. May 7, 2006
    TigerShark

    TigerShark Sponsor

    St. Louis, MO
    Joined:
    May 27, 2004
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    333
    If it's carbon, a little Marvel Mystery Oil in the gas is supposed to help clean it out.

    Jim
     
    TigerShark, May 7, 2006
    #2
  3. May 7, 2006
    m38willys

    m38willys Jeep Vice 2024 Sponsor

    Green Cove...
    Joined:
    Sep 30, 2002
    Messages:
    690
    I would think it is running a little rich. adjust your idle mixture screws to lean it out some and see if that helps.
     
    m38willys, May 7, 2006
    #3
  4. May 7, 2006
    DanStew

    DanStew Preowned Merkin salesman Staff Member

    Lexington, South...
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    Sep 22, 2002
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    4,585
    I am surprised they make you do emmisions with a jeep that old.
     
    DanStew, May 7, 2006
    #4
  5. May 7, 2006
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
    Joined:
    Sep 22, 2002
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    5,349
    Ditto!!
    Unless they're giving you lots of room for error theres no way that vehicle actually passes the test.
     
    Mcruff, May 7, 2006
    #5
  6. May 7, 2006
    powerwagon67

    powerwagon67 Mile-Hi Ghostrider

    westminster Co
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    Mar 31, 2006
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    I have them turned in as much as possible(about 3/4 turn out). What do you think about jetting it down some? My HC PPM readings were 128 at 2500rpm and 154 at idle (limits are 1000) CO% was
    .62 at 2500 and .16 at idle (limits were 4.50)
     
    powerwagon67, May 7, 2006
    #6
  7. May 7, 2006
    Warloch

    Warloch Did you say Flattie??? Staff Member

    Falcon, CO
    Joined:
    Mar 4, 2003
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    5,472
    I would jet down 2 if you have them to see if it clears up.. I am also big on the Marvel Mystery Oil - helps clean alot of the junk out.

    FWI - Here in CO you have to test all autos '59 and newer. If it's over 25 years old you can get collector plates that are good for 5 years and never have to test again once you pass.
     
    Warloch, May 7, 2006
    #7
  8. May 8, 2006
    runnamuck

    runnamuck look out!

    hickory, nc
    Joined:
    Nov 7, 2005
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    what were your NOx reading?
     
    runnamuck, May 8, 2006
    #8
  9. May 8, 2006
    powerwagon67

    powerwagon67 Mile-Hi Ghostrider

    westminster Co
    Joined:
    Mar 31, 2006
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    19
    No NOx readings were on the sheet.
     
    powerwagon67, May 8, 2006
    #9
  10. May 8, 2006
    Phalanxx

    Phalanxx Jeep Newbie

    iraq, texas,...
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    Jan 13, 2004
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    jet down some, limp over to the test site and run it..then when clear, jet back to what's right.
    just a thought.
     
    Phalanxx, May 8, 2006
    #10
  11. May 8, 2006
    jpflat2a

    jpflat2a what's that noise?

    Hermosa, SD
    Joined:
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    I think some carb work is in order
    two different circuits of the carb giving high readings
    idle circuit is different than the main metering circuit
    changing the jets won't change a thing at idle, only at cruise, 2500 RPM
    sounds more like loose screws/bad gaskets to me
     
    jpflat2a, May 8, 2006
    #11
  12. May 16, 2006
    powerwagon67

    powerwagon67 Mile-Hi Ghostrider

    westminster Co
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    Update on first post!
     
    powerwagon67, May 16, 2006
    #12
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