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1998 4Runner Misfire 3.4

Discussion in '3rd Gen 4Runners (1996-2002)' started by LandonFox, Dec 4, 2017.

  1. Dec 4, 2017 at 8:49 PM
    #1
    LandonFox

    LandonFox [OP] New Member

    Joined:
    Dec 4, 2017
    Member:
    #5122
    Messages:
    2
    Been chasing a mysterious multiple misfire.

    replaced:
    plugs
    wires
    coils
    injectors
    fuel pump and filter were also replaced in the past year

    still runs very rough and flashing CEL. codes P0300 P0304 P0306.
    any suggestions? I think my next step is compression check or possible fuel pressure regulator?
     
  2. Dec 5, 2017 at 4:21 AM
    #2
    RonT4R

    RonT4R New Member

    Joined:
    Mar 24, 2015
    Member:
    #526
    Messages:
    417
    Gender:
    Male
    First Name:
    Ron
    Virginia Beach
    Vehicle:
    2007 4runner SR5 4WD
    How did the plugs look after you removed them?
     
  3. Dec 5, 2017 at 12:56 PM
    #3
    LandonFox

    LandonFox [OP] New Member

    Joined:
    Dec 4, 2017
    Member:
    #5122
    Messages:
    2
    The plugs didn't look too bad, normal carbon buildup and normal ware, none looked especially worse than the others. And none were too wet.
     
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