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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 3 of 6
  1. Jan 22, 2022 at 7:24 PM
    #41
    jowybyo

    #41
    jowybyo Well-Known Member

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    Maybe if you post speed and RPM’s in other gears we could figure something out. Like 4th at 50mph and 3rd at 35mph, etc.
     
    jowybyo, Jan 22, 2022
    #41
  2. Jan 22, 2022 at 7:30 PM
    #42
    Yawn

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    Yawn [OP] **tree noise**

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    ~1250 and after running for a while I feel like it sits between there and 1k
     
    Last edited: Jan 22, 2022
    Yawn, Jan 22, 2022
    #42
  3. Jan 22, 2022 at 7:40 PM
    #43
    skeletron

    #43
    skeletron Disgraced Member

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    That seems really high
     
    skeletron, Jan 22, 2022
    #43
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  4. Jan 22, 2022 at 7:40 PM
    #44
    LearningToFly

    #44
    LearningToFly Well-Known Member

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    I think @0xDEADBEEF might be on to something. I think these motors idle at about 6 or 700 rpm.
     
    LearningToFly, Jan 22, 2022
    #44
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  5. Jan 22, 2022 at 7:43 PM
    #45
    Yawn

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    Yawn [OP] **tree noise**

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    yeah 1250 was cold start, 1k is normal, my bad for not clarifying better
     
    Yawn, Jan 22, 2022
    #45
  6. Jan 22, 2022 at 7:49 PM
    #46
    LearningToFly

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    LearningToFly Well-Known Member

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    That’s still too high. I bet it’s a 4cyl gauge cluster.
     
    LearningToFly, Jan 22, 2022
    #46
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  7. Jan 22, 2022 at 7:52 PM
    #47
    Yawn

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    Yawn [OP] **tree noise**

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    interesting. did you watch the vid I posted? do you feel that the sound does/doesnt match the reading? (genuinely curious on your opinion or if you have any idea hahaha its not very good audio)
     
    Yawn, Jan 22, 2022
    #47
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  8. Jan 22, 2022 at 7:52 PM
    #48
    Caddmannq

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    Caddmannq MotoNerd

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    If you drive my old International Scout, which goes 63 at 4000 RPM, and then get back in your Toyota, all your problems would feel solved.
    ;)
     
    Caddmannq, Jan 22, 2022
    #48
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  9. Jan 22, 2022 at 8:02 PM
    #49
    Nano909

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    Nano909 Stirrer Of Pots

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    I saw the video and I feel like the RPM's don't match the engine.
     
    Nano909, Jan 22, 2022
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  10. Jan 22, 2022 at 8:03 PM
    #50
    LearningToFly

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    LearningToFly Well-Known Member

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    I did. I think your tach is registering higher than the motor is actually turning.
     
    LearningToFly, Jan 22, 2022
    #50
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  11. Jan 22, 2022 at 8:06 PM
    #51
    OpeCity

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    OpeCity Well-Known Member

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    This makes sense. If you have an OBDii reader with an rpm readout, it might help
     
    OpeCity, Jan 22, 2022
    #51
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  12. Jan 22, 2022 at 8:12 PM
    #52
    Yawn

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    Yawn [OP] **tree noise**

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    hmmmmm ok that is super interesting, thanks fer your input guys!
     
    Yawn, Jan 22, 2022
    #52
  13. Jan 22, 2022 at 8:12 PM
    #53
    WorldwideTacoma

    #53
    WorldwideTacoma Well-Known Member

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    Get yourself a scan gauge. This is normal operating temp. Used to idle at 1500 until I fixed some leaks.
    12BE2F5B-068A-4D6B-B183-FE863D10C025.jpg
     
    WorldwideTacoma, Jan 22, 2022
    #53
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  14. Jan 22, 2022 at 8:14 PM
    #54
    tacoma4

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    tacoma4 Well-Known Member

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    4 cylinder cluster seems to be the most likely explanation, but does anyone know why? Rpm is independent of number of cylinders. Both the 3rz and 5vz have 32 tooth crank wheels (if I recall correctly) that the sensor reads position from, so why would it be different? Unless they just programmed them to interpret the signal differently to make life hard.
     
    tacoma4, Jan 22, 2022
    #54
    LearningToFly likes this.
  15. Jan 22, 2022 at 8:18 PM
    #55
    LearningToFly

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    LearningToFly Well-Known Member

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    Does the 3rz redline higher than the 3.4? That would let us know if the cluster had been swapped.
     
    LearningToFly, Jan 22, 2022
    #55
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  16. Jan 22, 2022 at 8:24 PM
    #56
    WorldwideTacoma

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    WorldwideTacoma Well-Known Member

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    I think someone messed with the cluster. Maybe took it apart and didn’t put the needle on correctly. Looks too new to not have been messed with. Only way to tell if it’s correct is to read the rpms through obd.
     
    WorldwideTacoma, Jan 22, 2022
    #56
  17. Jan 22, 2022 at 8:25 PM
    #57
    davidstacoma

    #57
    davidstacoma Friendly Curmudgeon

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    I listened to your video and sure sounds to me like your running high rpm’s at 4,000 indicated. It’s sure not an actual 1900-2000 rpm at 70mph. So have to disagree with others.

    Do the test suggested in post #11 and you’ll know.
     
    Last edited: Jan 22, 2022
    davidstacoma, Jan 22, 2022
    #57
  18. Jan 22, 2022 at 8:30 PM
    #58
    Squeaky Penguin

    #58
    Squeaky Penguin Nothing Ventured, Nothing Gained

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    IMO, sound does not match the tachometer at all. I bet that's the incorrect gauge as previously mentioned.
     
    Squeaky Penguin, Jan 22, 2022
    #58
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  19. Jan 22, 2022 at 8:33 PM
    #59
    ZColorado

    #59
    ZColorado Well-Known Member

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    @mechanicjon do you have an idea of whats going on here?
     
    ZColorado, Jan 22, 2022
    #59
  20. Jan 22, 2022 at 8:34 PM
    #60
    Squeaky Penguin

    #60
    Squeaky Penguin Nothing Ventured, Nothing Gained

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    Also, my MT truck doesn't have that slot in between the tach and speedo where the autos have the gear position indicator.

    So makes me wonder if someone swapped in a cluster from an automatic.
     
    Last edited: Jan 22, 2022
    Squeaky Penguin, Jan 22, 2022
    #60
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