Can’t figure out Misfire Issues

Discussion in '1995 - 2004 Toyota Tacoma' started by Hybee, Feb 13, 2019 at 9:34 AM.

  1. Hybee

    Hybee New Member

    I have a 2003 Tacoma with the 5vz-fe v6 with 175k on it. Threw multiple misfire and cylinder 3 and 5 misfire codes. I had just purchased the truck so I replaced all spark plugs(Denso), ignition coils(Denso), ignition wires(Denso), cleaned MAF sensor and throttle body, and installed new air filter. Check engine light came on about 200 miles later with the same codes. I then proceeded to replace cylinders 3 and 5 fuel injectors. Check engine light just came back with the same codes. I’m not experiencing any loss of power or hesitation through acceleration that I can tell. Has a shake at idle but goes away when given some fuel. Vacuum lines seem fine. I’m about out of ideas. Any advice would be appreciated.
    texasred likes this.
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  3. bdarnold12

    bdarnold12 Well-Known Member

    Seen a discussion about this same subject in a different forum. Some was agreeing over there that it could be cam position sensor, especially with both codes being on same bank. I'm no authority on this, just relaying what I've read.
    texasred, OR17TRD and Hybee like this.
  4. OR17TRD

    OR17TRD Well-Known Member

    ^ that
    Also maybe
    Make sure the ignition coil wires are going to the right places?
    Make sure the plug gaps are correct?
    Hybee, texasred and B-Man like this.
  5. OP

    Hybee New Member

    Thanks gents, I’ll look into those this weekend.
    OR17TRD and texasred like this.
  6. OP

    Hybee New Member

    I don’t think it would be cam positioning sensor because it is not throwing a code for it and I’m also not expiriencing the symptoms of this issue from what I could tell after looking them up. Thanks for the info though. I’m trying to rule out as much as I can before breaking down and taking it somewhere.
    texasred likes this.
  7. ToyTaco04

    ToyTaco04 Member

    Did spark plug 3 and 5 look the same as the rest?
    texasred likes this.

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