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Help with misfire

Discussion in '2nd Gen 4Runners (1990-1995)' started by JustBadLuck, Feb 26, 2017.

  1. Feb 26, 2017 at 11:29 AM
    #1
    JustBadLuck

    JustBadLuck [OP] New Member

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    I have a 1996 4Runner 3.4 ltr.

    I have a bad sputter especially when getting into the gas - starting off or going up-hill. I could not get a code for almost a full year. The I finally got a p0302 code. So I started throwing parts at it.

    I replaced:
    - all 3 Coil Packs
    - all spark plug wires
    - all spark plugs
    - all 6 fuel injectors
    - both O2 sensors
    - crankshaft sensor
    - ran 2 cans of 44K

    Each time I replaced one of these parts, I tested and the problem still persisted. The problem still persists. I have spoken to numerous mechanics as well as auto parts stores. No one can pinpoint the problem.

    Does anyone have any suggestions?
     
  2. Feb 26, 2017 at 4:26 PM
    #2
    Kyle11863

    Kyle11863 King of the BS

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    First Name:
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    Big Bear California
    Vehicle:
    1990 Toyota 4Runner SR5 V6 5 Speed Manual
    Doug Thorley long tube headers and lots of mud
    Well for one thing you're in the wrong section for a 96, which is probably why no one has offered any help. @Bob any chance of moving this to the third gen section?

    As far as your issue, has this problem been there since you got the 4runner or is it a newer issue? To me, it kind of sounds like its a timing issue. When I replaced the water pump on my camry it did the same thing, so I pulled the timing belt back a tooth or two and it went back to normal.
     
  3. Feb 26, 2017 at 4:36 PM
    #3
    JustBadLuck

    JustBadLuck [OP] New Member

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    As soon as I clicked Post I realized I was in the wrong forum, sry about that.

    I had the truck for about 6 months before I started having the problem. I've been working on it for a little over a year trying to solve the hesitation problem.

    Would the diagnostics pick up a timing issue? I am using an old CarMD.
     
  4. Feb 26, 2017 at 4:43 PM
    #4
    Kyle11863

    Kyle11863 King of the BS

    Joined:
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    Member:
    #807
    Messages:
    202
    Gender:
    Male
    First Name:
    Kyle
    Big Bear California
    Vehicle:
    1990 Toyota 4Runner SR5 V6 5 Speed Manual
    Doug Thorley long tube headers and lots of mud
    Lol its all good. Just figured I'd say something since we're not as accustomed the the 3.4 here.

    To be honest I'm not sure if diagnostics would pick up a timing issue. Most of the cars I work on are pre OBD II. Tell me if this sounds familiar, it idles fine but then starts to sputter around 2-3000 rpms?
     
  5. Feb 26, 2017 at 5:00 PM
    #5
    JustBadLuck

    JustBadLuck [OP] New Member

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    Thanks again for the reply.

    It sputters when taking off or going up hill...any time I have to get into the pedal. However It seems to idle perfect. I put a new Fuel Filter on this afternoon but of course that didn't make a difference.
     
  6. Feb 26, 2017 at 6:58 PM
    #6
    Kyle11863

    Kyle11863 King of the BS

    Joined:
    Jul 28, 2015
    Member:
    #807
    Messages:
    202
    Gender:
    Male
    First Name:
    Kyle
    Big Bear California
    Vehicle:
    1990 Toyota 4Runner SR5 V6 5 Speed Manual
    Doug Thorley long tube headers and lots of mud
    Hmm my money is still on the timing but I could easily be wrong, the 3rd gen guys would be the ones to ask
     
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