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3.4L Back fires and I need help

Discussion in '1st Gen. Tacomas (1995-2004)' started by AK1stGen, Oct 11, 2017.

  1. Oct 12, 2017 at 9:21 PM
    #61
    Bulldogs129

    Bulldogs129 There's no cure for Tacoma fever...

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  2. Oct 12, 2017 at 9:28 PM
    #62
    AK1stGen

    AK1stGen [OP] Active Member

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  3. Oct 12, 2017 at 10:33 PM
    #63
    AK1stGen

    AK1stGen [OP] Active Member

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    The scanner I barrowed is not showing anything with fuel trims, the only thing that has to do with fuel is shing when the circuit is open and closed. Maybe it because I don't know what I'm doing but do you have any suggestions on figuring out fuel trims?
     
  4. Oct 12, 2017 at 11:13 PM
    #64
    Brice

    Brice Turbo Member

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    Is it a scangauge?
     
  5. Oct 12, 2017 at 11:41 PM
    #65
    AK1stGen

    AK1stGen [OP] Active Member

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    It's a Bosch obd2 scan tool
     
  6. Oct 12, 2017 at 11:55 PM
    #66
    Brice

    Brice Turbo Member

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    What model?
     
  7. Oct 13, 2017 at 12:40 AM
    #67
    AK1stGen

    AK1stGen [OP] Active Member

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  8. Oct 13, 2017 at 12:46 AM
    #68
    Brice

    Brice Turbo Member

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  9. Oct 13, 2017 at 12:53 AM
    #69
    AK1stGen

    AK1stGen [OP] Active Member

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    Thanks! I'll let you know what I find out after work tomorrow
     
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  10. Oct 13, 2017 at 6:58 AM
    #70
    Bulldogs129

    Bulldogs129 There's no cure for Tacoma fever...

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    @AK1stGen
    I just called my Toyota parts guy to get a part# for the ignition control module (I thought about buying one off Amazon for a spare)...he told me our 3.4L only has 3 coils + PCM + crank & cam sensors, with the PCM being the controlling part...called the "Wasted spark ignition system".

    Take that for what its worth, but you might want to verify the part before ordering the amazon item. I'm interested in what you find out.

    Just to be curious I ask the pcm price...the PCM part#8966604021, $882.84 :eek:
     
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  11. Oct 13, 2017 at 7:37 AM
    #71
    mechanicjon

    mechanicjon They call me "Jonny 9 Fingers"

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    Your part number is wrong. Does come up. The ECM/PCM 89661-04021 Is the main computer. The v6 does have an igniter. Toyota Part No.: 89621-35020 is the current part number used.
     
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  12. Oct 13, 2017 at 8:12 AM
    #72
    Bulldogs129

    Bulldogs129 There's no cure for Tacoma fever...

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    :hattip:@mechanicjon

    Good info, this isn't the 1st time the toyota parts guy told me wrong...I can usually do better googling parts. The guy I trust, Gary, is off today...so I got a newbie on the phone. Thanks for clearing it up. Do you have any pics of this part in the engine bay?

    Does part# 89621-35020 replace # 89621-07010 ?
     
    Last edited: Oct 13, 2017
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  13. Oct 13, 2017 at 8:39 AM
    #73
    AK1stGen

    AK1stGen [OP] Active Member

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    IMG_1832.jpg
     
  14. Oct 13, 2017 at 8:44 AM
    #74
    Bulldogs129

    Bulldogs129 There's no cure for Tacoma fever...

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    :yes: That's the same one on Amazon. I might go ahead and order a spare. The price is right...Thanks
     
  15. Oct 13, 2017 at 9:06 AM
    #75
    mechanicjon

    mechanicjon They call me "Jonny 9 Fingers"

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    yes
     
  16. Oct 13, 2017 at 2:06 PM
    #76
    AK1stGen

    AK1stGen [OP] Active Member

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    LT FTRM1 - 12.5%
    ST FTRM1 - -0.8%
    This at idle

    I can't make sense of any of these numbers but hopefully someone can.
     
  17. Oct 13, 2017 at 3:17 PM
    #77
    AK1stGen

    AK1stGen [OP] Active Member

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    2nd new MAF sensor did not make a difference.
     
  18. Oct 13, 2017 at 4:45 PM
    #78
    AK1stGen

    AK1stGen [OP] Active Member

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    Igniter also made no difference.
     
  19. Oct 13, 2017 at 7:35 PM
    #79
    AK1stGen

    AK1stGen [OP] Active Member

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    Another problem has come up, my fuel guage doesn't work! I must have messed somthing up when I did my fuel pump.
    . :redxfall:
     
  20. Oct 13, 2017 at 7:35 PM
    #80
    Dalandser

    Dalandser Million bucks short of being a millionaire

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