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4k rpm @ 70 mph...what to do?

Discussion in '1st Gen. Tacomas (1995-2004)' started by Yawn, Jan 22, 2022.

Page 5 of 6
  1. Jan 24, 2022 at 9:34 AM
    #81
    Yawn

    #81
    Yawn [OP] **tree noise**

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    Will do! thanks all for the help and suggestions!
     
    Yawn, Jan 24, 2022
    #81
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  2. Jan 24, 2022 at 6:07 PM
    #82
    mechanicjon

    #82
    mechanicjon They call me "Jonny Stubs"

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    Sorry for the late response. Yes the 4cyl cluster is different then the 6cyl cluster. It all is in the file flashed to the rom chip in the digital odometer module. I can fix that.

    Edit: Correction the cluster itself is the same. It's the actual odometer module that plugs in back of cluster that is programmed different. Same module just different programing. I can reflash them for a nominal fee.
     
    Last edited: Jan 24, 2022
    mechanicjon, Jan 24, 2022
    #82
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  3. Jan 28, 2022 at 12:58 PM
    #83
    Yawn

    #83
    Yawn [OP] **tree noise**

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    alrighty I finally got around to jacking it up and got 2 driveshaft rotations for one wheel rotation...

    EDIT: @SqueakyPenguin helped me not be stupid and the ratio looks like it has to be stock - 4.10
    :duh:
     
    Last edited: Jan 28, 2022
    Yawn, Jan 28, 2022
    #83
  4. Jan 28, 2022 at 1:10 PM
    #84
    Squeaky Penguin

    #84
    Squeaky Penguin Nothing Ventured, Nothing Gained

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    Only one tire spinning?

    You would need to double the count in that case. Almost certainly stock 4.10 gears.
     
    Squeaky Penguin, Jan 28, 2022
    #84
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  5. Jan 28, 2022 at 1:12 PM
    #85
    Yawn

    #85
    Yawn [OP] **tree noise**

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    yes ok that would make a lot more sense and then yeah they must be 4.10. Looking at the video closer the wheel just barely doesn't actually make the full rotation, so its gotta be 4.10

    wtf is going on then?

    I guess next step would be get an OBD of sorts and see if the RPM reading on the tach is correct? Is there a way to identify what gauge cluster is in the truck? What else could I do?
     
    Last edited: Jan 28, 2022
    Yawn, Jan 28, 2022
    #85
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  6. Jan 28, 2022 at 1:38 PM
    #86
    ColoradoTJ

    #86
    ColoradoTJ Retired cat herder Moderator

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    Yeah, I would call that 4.10 gears.

    Next would be like others have stated…time to check tachometer.
     
    ColoradoTJ, Jan 28, 2022
    #86
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  7. Jan 28, 2022 at 4:54 PM
    #87
    theesotericone

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    theesotericone Well-Known Member

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    Pick up an ODBII reader and buy Torque Pro for your phone. Hook them up and see what the ECU is really saying RPMs are. The other way is to see where the rev limiter kicks in. I'm betting you peg out the tach before it does. lol
     
    theesotericone, Jan 28, 2022
    #87
    LearningToFly likes this.
  8. Jan 28, 2022 at 4:55 PM
    #88
    Yawn

    #88
    Yawn [OP] **tree noise**

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    you have recommendations for a ODBII?
     
    Yawn, Jan 28, 2022
    #88
  9. Jan 28, 2022 at 4:58 PM
    #89
    MalinoisDad

    #89
    MalinoisDad Misanthropic dog person

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    I would buy my scangauge 2 over again. Reads all sorts of stuff and you can reset trouble codes as well as see pending codes that have not yet triggered a CEL. My voltage is showing low because I had just turned off the engine.

    A72F0F5E-7229-4FF7-A1C8-D89C95A8117F.jpg
     
    MalinoisDad, Jan 28, 2022
    #89
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  10. Jan 28, 2022 at 5:00 PM
    #90
    theesotericone

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    theesotericone Well-Known Member

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    theesotericone, Jan 28, 2022
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  11. Jan 28, 2022 at 6:28 PM
    #91
    LearningToFly

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    LearningToFly Well-Known Member

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    You have to really wind these motors out to get 4k or 4500 rpm. You’re casually doing it between every gear. I don’t think there’s any way that tach is right.
     
    LearningToFly, Jan 28, 2022
    #91
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  12. Jan 28, 2022 at 6:51 PM
    #92
    treyus30

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    treyus30 70% complete 70% of the time

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    treyus30, Jan 28, 2022
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  13. Jan 28, 2022 at 7:11 PM
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    ZColorado

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    ZColorado Well-Known Member

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    I have the cheap $6 one on my truck. Works great with torque on an android device (which happens to be my headunit)
     
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    ZColorado, Jan 28, 2022
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  14. Jan 28, 2022 at 9:00 PM
    #94
    treyus30

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    treyus30 70% complete 70% of the time

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    Yep, me too.
     
    treyus30, Jan 28, 2022
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  15. Feb 2, 2022 at 6:50 PM
    #95
    Yawn

    #95
    Yawn [OP] **tree noise**

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    Yawn, Feb 2, 2022
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  16. Jul 6, 2022 at 8:20 PM
    #96
    Yawn

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    Yawn [OP] **tree noise**

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    Alright! After waaay toooo long I finally got around to getting a scan gauge and what do ya know...

    IMG_4944.jpg
    actual RPM @ idle, "1250-1000" on the tach



    IMG_4946.jpg
    actual RPM @ "4000" on the tach


    So now we know! Still confused as to why the the rom chip in the odometer module is outta wack or if it could still be something else, but I'm happy to know for sure im not ripping 4k @ 70mph :)

    Thanks all for the input and comments!
     
    Last edited: Jul 8, 2022
    Yawn, Jul 6, 2022
    #96
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  17. Jul 7, 2022 at 2:54 AM
    #97
    LearningToFly

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    LearningToFly Well-Known Member

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    Thanks for the update. I thought you had forgotten about us!
     
    LearningToFly, Jul 7, 2022
    #97
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  18. Jul 7, 2022 at 3:56 AM
    #98
    Jakuku Pahwheenis

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    Jakuku Pahwheenis i provide useless forum contributions

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    NOICE! Glad you figured that out.

    Only time I went over 4k was when I thought I was shifting down to 4th, but accidentally shifted into 2nd ***HIGH RPM NOISES***
     
    Jakuku Pahwheenis, Jul 7, 2022
    #98
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  19. Jul 7, 2022 at 5:20 AM
    #99
    An3

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    An3 Well-Known Member

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    I’ve had the same with my truck since I bought it. I got a scan gauge and when I’m at 4K per the tach, I’m actually at about 2700 according to the SG and the calculations I’ve made
     
    An3, Jul 7, 2022
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  20. Jul 7, 2022 at 11:19 PM
    #100
    CrippledOldMan

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    CrippledOldMan Well-Known Member

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    why is your scan gauge showing 0mph when it's showing 2798 RPM ? Am I missing something. I have mine set to show ATF temp, Water Temp, Mpg, and voltage output. I change the Mpg to Mph just to check my actual speed to what the odometer says.
     
    CrippledOldMan, Jul 7, 2022
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Page 5 of 6

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