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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.

Page 4 of 6
  1. Oct 12, 2017 at 9:21 PM
    #61
    Bulldogs129

    #61
    Bulldogs129 Don't find fault, find a remedy

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    Bulldogs129, Oct 12, 2017
    #61
  2. Oct 12, 2017 at 9:28 PM
    #62
    AK1stGen

    #62
    AK1stGen [OP] Active Member

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    AK1stGen, Oct 12, 2017
    #62
    Bulldogs129[QUOTED] and Dalandser like this.
  3. Oct 12, 2017 at 10:33 PM
    #63
    AK1stGen

    #63
    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?
     
    AK1stGen, Oct 12, 2017
    #63
  4. Oct 12, 2017 at 11:13 PM
    #64
    Brice

    #64
    Brice Turbo Member

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    Is it a scangauge?
     
    Brice, Oct 12, 2017
    #64
  5. Oct 12, 2017 at 11:41 PM
    #65
    AK1stGen

    #65
    AK1stGen [OP] Active Member

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    It's a Bosch obd2 scan tool
     
    AK1stGen, Oct 12, 2017
    #65
  6. Oct 12, 2017 at 11:55 PM
    #66
    Brice

    #66
    Brice Turbo Member

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    What model?
     
    Brice, Oct 12, 2017
    #66
  7. Oct 13, 2017 at 12:40 AM
    #67
    AK1stGen

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    AK1stGen [OP] Active Member

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    AK1stGen, Oct 13, 2017
    #67
  8. Oct 13, 2017 at 12:46 AM
    #68
    Brice

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    Brice Turbo Member

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    #68
  9. Oct 13, 2017 at 12:53 AM
    #69
    AK1stGen

    #69
    AK1stGen [OP] Active Member

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    Thanks! I'll let you know what I find out after work tomorrow
     
    AK1stGen, Oct 13, 2017
    #69
    Brice[QUOTED] likes this.
  10. Oct 13, 2017 at 6:58 AM
    #70
    Bulldogs129

    #70
    Bulldogs129 Don't find fault, find a remedy

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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:
     
    Bulldogs129, Oct 13, 2017
    #70
    Brice and Dalandser like this.
  11. Oct 13, 2017 at 7:37 AM
    #71
    mechanicjon

    #71
    mechanicjon They call me "Jonny Stubs"

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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.
     
    mechanicjon, Oct 13, 2017
    #71
    Bulldogs129[QUOTED] and Dalandser like this.
  12. Oct 13, 2017 at 8:12 AM
    #72
    Bulldogs129

    #72
    Bulldogs129 Don't find fault, find a remedy

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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
    Bulldogs129, Oct 13, 2017
    #72
    Dalandser and mechanicjon[QUOTED] like this.
  13. Oct 13, 2017 at 8:39 AM
    #73
    AK1stGen

    #73
    AK1stGen [OP] Active Member

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    IMG_1832.jpg
     
    AK1stGen, Oct 13, 2017
    #73
  14. Oct 13, 2017 at 8:44 AM
    #74
    Bulldogs129

    #74
    Bulldogs129 Don't find fault, find a remedy

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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
     
    Bulldogs129, Oct 13, 2017
    #74
  15. Oct 13, 2017 at 9:06 AM
    #75
    mechanicjon

    #75
    mechanicjon They call me "Jonny Stubs"

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    yes
     
    mechanicjon, Oct 13, 2017
    #75
  16. Oct 13, 2017 at 2:06 PM
    #76
    AK1stGen

    #76
    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.
     
    AK1stGen, Oct 13, 2017
    #76
  17. Oct 13, 2017 at 3:17 PM
    #77
    AK1stGen

    #77
    AK1stGen [OP] Active Member

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    2nd new MAF sensor did not make a difference.
     
    AK1stGen, Oct 13, 2017
    #77
  18. Oct 13, 2017 at 4:45 PM
    #78
    AK1stGen

    #78
    AK1stGen [OP] Active Member

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    Igniter also made no difference.
     
    AK1stGen, Oct 13, 2017
    #78
  19. Oct 13, 2017 at 7:35 PM
    #79
    AK1stGen

    #79
    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:
     
    AK1stGen, Oct 13, 2017
    #79
  20. Oct 13, 2017 at 7:35 PM
    #80
    Dalandser

    #80
    Dalandser ¡Me Gustan Las Tacos-mas!

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    Dalandser, Oct 13, 2017
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Page 4 of 6

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