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1G Speedometer not fully working

Posted by Mason Costoff, Nov 8, 2019

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  1. Mason Costoff

    Mason Costoff Probationary Member

    2
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    Joined Nov 8, 2019
    Crystal Lake, Illinois
    I was driving normally going about 45mph and out of nowhere my speedo started making lots of noise and jumped up to around 130mph. It started bouncing around rapidly in the range of ~100mph-max. I did not see any pattern or immediate relation to any other gages/throttle/tach. From what I can tell all other gages work fine still and the speedometer works correctly up until about 35mph before it starts jumping around again. Any help, advice, and ideas are appreciated
     

    Street Build 171  1

    1993 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM
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  2. BLACK'98DSM

    BLACK'98DSM Proven Member

    944
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    Joined Feb 9, 2019
    Hoover, Alabama
    My first thought is the speed sensor.

    But I think it would really help if we knew what vehicle you have. Try making a DSM profile.
     

    Road Race Build 2K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    355  3

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles

    268  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles
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  3. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

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    Joined Nov 14, 2013
    Independence, Kansas
    Unscrew the speedometer cable at the transmission. Pull the center cable out and lube it with wheel bearing grease and thread it back into the cable, up to the speedometer head. You may have to spin it a bit to get it to go back into the speedometer as most have a square head that goes into the head unit. We did this back in the 70's and 80's for the same problems on multiple cars. This usually fixes them if they are completely mechanical, which yours should be if its a 1g.
    Good luck!
     

    Street Build 3K  27

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM

    452  14

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    421  17

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 608  4

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
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    tk106 and BLACK'98DSM like this.
  4. BLACK'98DSM

    BLACK'98DSM Proven Member

    944
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    Joined Feb 9, 2019
    Hoover, Alabama
    Oh sh**, I didn't see the 1g mark
     

    Road Race Build 2K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    355  3

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles

    268  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles
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  5. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    4,448
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    Joined Nov 14, 2013
    Independence, Kansas
    Get with it Solomon.........:p
    A profile would be a handy thing for the OP to work on for sure!
     

    Street Build 3K  27

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM

    452  14

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    421  17

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 608  4

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
    Loading...
    BLACK'98DSM likes this.
  6. BLACK'98DSM

    BLACK'98DSM Proven Member

    944
    297
    Joined Feb 9, 2019
    Hoover, Alabama
    I don't need to post on the forums unless I've had more than 4 hours of sleep. :boring:
     

    Road Race Build 2K  25

    1998 Mitsubishi Eclipse N/T
    fwd · manual · 2G DSM

    355  3

    2012 Murray Explorer Dune
    rwd · automatic · Misc Vehicles

    268  6

    2009 Troy Bilt Bronco
    rwd · automatic · Misc Vehicles
    Loading...
    1990TSIAWDTALON likes this.
  7. 1990TSIAWDTALON

    1990TSIAWDTALON Moderator

    4,448
    1,923
    Joined Nov 14, 2013
    Independence, Kansas
    Just teasin ya man!!!
     

    Street Build 3K  27

    1992 Eagle Talon TSi AWD
    awd · automatic · 1G DSM

    452  14

    1990 Mitsubishi Eclipse GSX
    awd · manual · 1G DSM

    421  17

    1967 Chevrolet Camaro RS
    rwd · automatic · Misc Vehicles

    Street Build 608  4

    1998 Eagle Talon TSi
    fwd · manual · 2G DSM

    Street Build 5K  11  25

    1990 Eagle Talon TSi AWD
    13.620 @ 108.460 · 1G DSM
    Loading...

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