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2001 Jeep Wrangler Misfire

Discussion in 'Wrangler TJ (1996-2006)' started by VvKev, Mar 22, 2022.

  1. Mar 22, 2022 at 5:49 AM
    #1
    VvKev

    VvKev [OP] New Member

    Joined:
    Mar 22, 2022
    Member:
    #6342
    Messages:
    1
    Gender:
    Male
    First Name:
    Kevin
    Vehicle:
    2001 Wrangler
    6” lift and 35” tires
    Hello,


    I have a 2001 Jeep Wrangler 4.0 with only about 58,000 miles. I’ve recently developed a misfire. Codes P0300, P0304, and P306. It is difficult to start, has tough idle, loss of power driving, and has shut down at 3000 rpms. Engine does not overheat and I do not have a loss of oil pressure.


    I’ve changed the coil pack, spark plugs, injectors, cam shaft position sensor, and 02 sensor. I initially was fearful of a cracked head, but my oil isn’t milky, no White smoke out of the exhaust, and radiator fluid clean. Upon doing a block tester kit on the radiator I am not getting exhaust fumes in the radiator.


    I’m honest at a loss of what to try next. Possibly excessive carbon build up on the valves? Catalytic converter clogged up? Bad ECM?


    Any and all advise is much appreciated.

    Thanks in advance!
     
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