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Why WOT to read plugs?

Discussion in 'Early CJ5 and CJ6 Tech' started by farfle, Feb 16, 2008.

  1. Feb 16, 2008
    farfle

    farfle old dog

    Mariposa, CA
    Joined:
    May 14, 2007
    Messages:
    430
    Why run at WOT, shut off, coast to the side of the road, and read your plugs for the most "accurate" reading?

    I rarely, almost NEVER run WOT. Why not run at 2000-2500 rpm, shut off, coast, and read?

    Seems like it's a racer thing to me. Jeepers don't spend a whole lot of time at WOT, at least not this one.
     
    farfle, Feb 16, 2008
    #1
  2. Feb 16, 2008
    mrhp

    mrhp Member

    Joined:
    Nov 26, 2005
    Messages:
    95
    Thats to check fuel delivery wfo. Only needed for race vehicles that see wfo for their entire life. Not really a street driven type test.Just to make sure they don't go lean and burn down.
     
    mrhp, Feb 16, 2008
    #2
  3. Feb 16, 2008
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
    Joined:
    Sep 22, 2002
    Messages:
    8,360
    Nope, run it down the highway at mid throttle for several miles at mid throttle, then check them...
     
    Patrick, Feb 16, 2008
    #3
  4. Feb 16, 2008
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
    Messages:
    4,275
    The WOT was taught to me for a race engine, but the more I think about it you guys are probably right. The only thing I can think of is that at cruising speed you will still have a pretty high manifold vacuum and theerefore the idle circuits may still be supplying some fuel to the mixture. At WOT this cannot occur due to the low vacuum condition in the intake. Does that make any sense?
     
    w3srl, Feb 16, 2008
    #4
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