#misfire

  1. Keiterburb

    2012 Suburban Misfire #5 drama

    Hello, 2012 Suburban 198,000 miles Vin 7 LC9 5.3 completely stock config and parts having P0305 CYLINDER 5 misfire with misfire felt at idle and smooths out under throttle. Recently began also seeing P219A. Under idle and cold temps in Wyoming the traction control will alert and turn off until...
  2. Z

    P0300 code on 2004 GMC Yukon XL Denali - 119,000 miles

    2004 GMC Yukon XL Denali - 119,000 miles Have had a P0300 code for a while now. Changed everything from spark plugs to lifters, cleaned as much dirt and carbon off the engine, but I still get the same code. After driving for a while, there is a noticeable shake / vibration at idle. Also, all of...
  3. laredo1307

    96 Tahoe Random Misfire P0300

    Hello Gentlemen, I'm at a loss on trying to find the source of my misfire. The strange thing is it only happens when I fire it up in the mornings and will last my whole commute to work, which is about 30miles. It only throws a P0300 code and something is definitely telling it to dump too much...
  4. A

    P0300 random misfire

    Hello. I am having issues with a 2005 Tahoe 5.3. The truck starts and runs fine for a few minutes and then out of the blue it will throw p0300 and randomly misfire. The truck will misfire for a few minutes and then run perfectly fine after. If I watch the misfires I’m live data when this occurs...
  5. S

    a few mis-fires during drive cycle?

    2011 Chevy Tahoe 5.3 4x4 I recently bought this vehicle 97k miles I went ahead and did new ac Delco spark plugs, intake manifold gasket, both exhaust manifold gaskets, both valve cover gaskets, all 4 oxygen sensors, ring gasket driver side exhaust to cat, donut gasket for passenger side exhaust...
  6. A

    2006 yukon xl 1500, 4th cylinder misfire

    Hello folks, I have a 2006 5.3l Yukon CL 1500 with a 4th cylinder misfire. Changed the plugs, the coil to check if the misfire would follow (it didn’t), cleaned the MAF sensor, cleaned the throttle body, ran some seafoam through the gas tank, and am just about out of ideas. Any suggestions?
  7. RayRaysJukeJoint

    2015 6.2 misfire on #8 Help please.

    I have a 2015 yukon xl with the 6.2. It started misfiring on 8 and so far I have done the following. 1. New Plugs 2. New Plug Wires 3. New Injectors Still, the misfire is there. I get the P0300 and then the P0308 code and I am at a loss as to what to try next. Oh and I swapped the coil out...

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