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Thread: 02 Yukon P0300 and bad running

  1. #1
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    02 Yukon P0300 and bad running

    Friday I was out on lunch in my '02 Yukon. As I was returning to work I tromped on the gas and my truck fell hard on it's face, shuddering, bucking and barely idling. Through a P0300 random misfire code.
    Thought it maybe an intake manifold leak but carb cleaner hose down didnít find any vac leaks.
    Any ideas where to start before I bring it in. I would probe myself a little more but just don't have time and I need it diagnosed as I need my truck.
    90 YJ. 4link F/R, 16" SAW Airshocks, 32bolt Beadlocks, D60/14bolt, Full Hydro/Hydroboost L67 3.8SC 700r4 NP231/D300
    02 Yukon XL on 37's DD
    91 Cherokee Juggy scrapped for Greener Grass
    I prefer to build it and not buy it, you see it, I probably made it.

  2. #2
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    had the same thing a few weeks ago, ran some lucas injector cleaner through it and it cleared up
    WHAT WOULD MACGYVER DO?

    2004 rubicon: 12,000 lb titan winch, 35" goodyear wranglers, staang's belly-up skid, cobra 29 cb, highline fenders, trailhead bumpers

    http://www.youtube.com/user/onehosereh#p/u

    VA3 HWG, OF4WD #5571, RETREAD #1

  3. #3
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    Google-fu forum link says MAP, MAF, plug, wire, injector or fuel pressure regulator on driverside fuel rail. Easy enough to check all
    http://www.fullsizechevy.com/forum/g...o300-code.html
    97 TJ - The Build
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