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Running rich

Discussion in 'Intermediate CJ-5/6/7/8' started by barry, Aug 17, 2006.

  1. Aug 17, 2006
    barry

    barry Inquisitive Member

    Earp, CA
    Joined:
    Sep 23, 2002
    Messages:
    195
    My '79 with the 258 appears to be running real rich. I have adjusted the carb, changed plugs and wires and no change. It was suggested by a friend that I might have a vacuum leak causing it. Can this be a cause? What's the best way to chase it down if it is?
     
    barry, Aug 17, 2006
    #1
  2. Aug 17, 2006
    mpc

    mpc Member

    Vista, CA 92083...
    Joined:
    Aug 18, 2005
    Messages:
    779
    I think Sparky's "Cutting out at cruising speed" thread had some suggestions in it. If it's a possible leak at the carb base, spray some starting fluid around it and see if you get any jumps (or something to that affect).
     
    mpc, Aug 17, 2006
    #2
  3. Aug 17, 2006
    MCSCOTT

    MCSCOTT Member

    Columbia, Tn
    Joined:
    Apr 24, 2006
    Messages:
    905

    X2 the rpms will go up if there is any leak from the intake gasket or the carb base or anything like that. As far as any other vacuum leaks it is mostly just having to track down all the vacuum lines and check them all.
     
    MCSCOTT, Aug 17, 2006
    #3
  4. Aug 17, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Hah! Don't even bother sorting through that.

    Yeah, starting fluid should make the RPM jump. I had a vacuum gauge on mine, the vacuum dropped when I sprayed it around the base. That's how I found it. The RPM change was there, but hard for me to pick up on immediately. That's why it took me so danged long to find it.
     
    sparky, Aug 17, 2006
    #4
  5. Aug 17, 2006
    barry

    barry Inquisitive Member

    Earp, CA
    Joined:
    Sep 23, 2002
    Messages:
    195
    Just found why no power. Plug wires 2 & 3 reversed. No backfire, smooth idle, but no power. Interesting. Going to take it for a ride and then I'll get the starter fluid out.
    Thanks guys.
     
    barry, Aug 17, 2006
    #5
  6. Aug 17, 2006
    MCSCOTT

    MCSCOTT Member

    Columbia, Tn
    Joined:
    Apr 24, 2006
    Messages:
    905
    If the plug wires didn't fix it, and you have no backfire, smooth idle, and it doesn't have any power, it is most likely an intake or carb gasket leak, or a vacuum leak in one of the lines. Let us know how it turns out.
     
    MCSCOTT, Aug 17, 2006
    #6
  7. Aug 17, 2006
    barry

    barry Inquisitive Member

    Earp, CA
    Joined:
    Sep 23, 2002
    Messages:
    195
    Power came back with switching the wires. Looks like all is good. Thanks.
     
    barry, Aug 17, 2006
    #7
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