1. Welcome to Jeeps.net!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Jeep discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Jeep owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Speedometer is reading 4x fast

Discussion in 'Wrangler TJ (1996-2006)' started by LEEDAWG, Sep 13, 2016.

  1. Sep 13, 2016 at 10:36 AM
    #1
    LEEDAWG

    LEEDAWG [OP] Member

    Joined:
    Sep 13, 2016
    Member:
    #211
    Messages:
    5
    Gender:
    Male
    First Name:
    earl
    Vehicle:
    2004 rubicon
    I have a 04 jeep rubicon my speedometer is reading 4x fast, cluster is reading the same as pcm.

    The sensor has been replaced 2 times and pcm has been replaced 2 times and i've ran new wires from pcm to sensor. Also have disconnected battery and touched cables together at least 50 times and have did pcm reset with DRB111 about 50 times. Also have a perfect 5 volt square wave with scope, and i have removed cluster and test drove pcm. It still reads 4 times fast and my relucter ring in transfer case has 3 cogs.

    Thanks in advance for any help.
     
    Last edited by a moderator: Sep 13, 2016
  2. Sep 13, 2016 at 12:31 PM
    #2
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Earl;

    Is this jeep new to you? Did you just make any major changes? Did it just happen one day out of the blue?

    :)
     
  3. Sep 13, 2016 at 12:55 PM
    #3
    LEEDAWG

    LEEDAWG [OP] Member

    Joined:
    Sep 13, 2016
    Member:
    #211
    Messages:
    5
    Gender:
    Male
    First Name:
    earl
    Vehicle:
    2004 rubicon
    i bought it like this, only thing that has been done to it before i got it was a new starter and radiator, and it has 285 75 16 in tires which would not make but a slight difference. I'm at wits end.
     
  4. Sep 13, 2016 at 1:17 PM
    #4
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    ...that would only make about 5mph diff at 65mph. Why I asked is...if the last owner set it up for larger tires then it could simply be it has not been re-calibrated back to the smaller, stockish tires. ??? Just tossing around ideas......

    I know you say it has not been changed but have you verified you have the correct gear for the sensor? You have checked all the things you think it can be...humor me :) and check one you think can't be the issue.
     
    JKBob 25 likes this.
  5. Sep 13, 2016 at 2:03 PM
    #5
    LEEDAWG

    LEEDAWG [OP] Member

    Joined:
    Sep 13, 2016
    Member:
    #211
    Messages:
    5
    Gender:
    Male
    First Name:
    earl
    Vehicle:
    2004 rubicon
    no gear, has speed sensor.
     
  6. Sep 13, 2016 at 2:32 PM
    #6
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    I deleted my comments here to make myself look better. (a little less dense) For someone who hates being wrong so very much...I sure do manage it so very often. haha
     
    Last edited: Sep 13, 2016
    JKBob 25 and chris4x4 like this.
  7. Sep 13, 2016 at 2:35 PM
    #7
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    I am assuming you have just replaced that top piece (the sensor) and have not verified the speedometer gear housing (the sensor attaches to this) and the gear (under the housing).

    Am I getting warmer??? or do I have to come back looking like: :anonymous:
     
    JKBob 25 likes this.
  8. Sep 13, 2016 at 2:37 PM
    #8
    LEEDAWG

    LEEDAWG [OP] Member

    Joined:
    Sep 13, 2016
    Member:
    #211
    Messages:
    5
    Gender:
    Male
    First Name:
    earl
    Vehicle:
    2004 rubicon
    I've already replaced it 2 times with sensor from dealer it has no gear, from my understanding wrangler's have gear's and Rubicon's have sensor's.
     
  9. Sep 13, 2016 at 2:52 PM
    #9
    C2T

    C2T Well-Known Member

    Joined:
    Jul 31, 2016
    Member:
    #42
    Messages:
    763
    Gender:
    Male
    First Name:
    Richard
    Helena, Montana
    Vehicle:
    Jeep
    2.5" AEV Dual Sport lift, 35" Treadwright Guard Dogs, Black Rock Wheels, AEV Front & Rear Bumpers with Tire Carrier, Fuel Caddy 10 gal. Aux. fuel tank, Warn 9.5ti, 125' synthetic winch line, front axle skid, 20" LED light bar , Bilstein Shocks, steel steering skidplate,
    Stranger things have happened. A different transfer case....(241 vs 231) Makes sense. Damn....well ok :anonymous:

    lol ...and since you have replaced the PCM... That was all I had.

    I am going to go suck my thumb in a corner for a while.....

    I will be back if I have any "enlightened" ideas. :sorry:
     
    JKBob 25, chris4x4 and Bob like this.
  10. Sep 13, 2016 at 4:07 PM
    #10
    LEEDAWG

    LEEDAWG [OP] Member

    Joined:
    Sep 13, 2016
    Member:
    #211
    Messages:
    5
    Gender:
    Male
    First Name:
    earl
    Vehicle:
    2004 rubicon
    thank you, all help is appreciated.
     
  11. May 11, 2017 at 7:18 PM
    #11
    JKBob 25

    JKBob 25 Well-Known Member

    Joined:
    Mar 22, 2017
    Member:
    #1197
    Messages:
    3,890
    Gender:
    Male
    First Name:
    Bob
    Jersey Shore, NJ
    Vehicle:
    2016 JK Wrangler Sport
    I know this is a some what old thread. But after reading it. I was curious if leedawg ever figured out the issue. I enjoy learning issues and their fixes.
    It's like a bad murder mystery. You still want to know who killed the butler. Lol.
    And C2T. Hope you have taken that bag off your head by now. Lol.
     
  12. May 11, 2017 at 8:08 PM
    #12
    OFFGRID

    OFFGRID Well-Known Member

    Joined:
    Oct 3, 2016
    Member:
    #317
    Messages:
    2,018
    Gender:
    Male
    First Name:
    Peter
    Houston
    Vehicle:
    1979 Jeep CJ7, 258, TH350, NP208
    Howell fuel injection, header, HEI distributor, TH350, NP208, SOA lift with YJ springs in the front & GW springs in the Rear. AMC20 with G2 1 piece chromos trussed, Dana 30 with G2 chromos and 760x ujoints and MM Stainless Hubs, Geared 4.56. Tom Woods shafts, Metal cloaks, Caged, 37" Toyo MTs.
  13. May 12, 2017 at 6:53 PM
    #13
    JKBob 25

    JKBob 25 Well-Known Member

    Joined:
    Mar 22, 2017
    Member:
    #1197
    Messages:
    3,890
    Gender:
    Male
    First Name:
    Bob
    Jersey Shore, NJ
    Vehicle:
    2016 JK Wrangler Sport
    Thanks Peter. Once again....you come through. Thank you.
     
To Top