04" Rough Running Problem, baffles me

Discussion in 'General Chevy & GM Tech Questions' started by Payner, Aug 25, 2013.

  1. Payner

    Payner New Member

    My name is Larry Payne, I have a 2004 Silverado with I believe a Vortec 4.8l v-8. When on a trip at highway speed it starting running rough acting like it was starving for or drowning in fuel. When I kicked it down to pass you couldn't see through the black smoke behind me. It has done this a couple of times now and the code reads P0300 (random misfire). I don't know if this has anything to do with it it but the air conditioning also quit working on the drivers side only which makes absolutely no sense to me. I cancelled the code and it hasn't done it since, around town it seems fine.

  2. mfleetwood

    mfleetwood Rockstar 4 Years ROTM Winner 5000 Posts

    Not sure about the A/C but here is some info regarding your 0300 code just in case it comes back.


    Random/Multiple Cylinder Misfire Detected

    What does that mean?

    Symptoms may include: the engine may be harder to start the engine may stumble, and/or hesitate; other symptoms may also be present

    A code P0300 may mean that one or more of the following has happened: Faulty spark plugs or wires; Faulty coil (pack); Faulty oxygen sensor(s); Faulty fuel injector(s); Burned exhaust valve; Faulty catalytic converter(s); Stuck/blocked EGR valve / passages; Faulty camshaft position sensor; Defective computer

    Possible Solutions
  3. Payner

    Payner New Member

    Thanks for the info, it appears by the possible causes, that it might be cheaper to trade it for a horse than try to find the problem :neutral:

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