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Cold weather speedometer problem

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  • Cold weather speedometer problem

    I have been daily driving the '90L plus. Automatic with factory tach/speedo cluster. At any given time the speedometer is inaccurate at all speeds and has a slight rattling sound. It also reads about 10MPH slow. In cold weather though, over 25 MPH all hell breaks loose. The sound of a swarm of angry bees and needle vibrates and jumps to anywhere from 65 to pegged at 85+. This will continue until I slow to 25 MPH or so. I've had the speedo cable out and took the core out. Cleaned and lubed with dry powder graphite and reinstalled. Still happens. Any ideas. Would it likely be the cable or the gauge that is the issue? Is it even possible to lubricate the speedo gauge?

    Watch below.
    1990 Festiva cold weather issue. Automatic car with factory tach/speedo cluster. At any given time the speedometer is inaccurate at all speeds and has a slig...
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  • #2
    Have you pulled the pinion gear and checked the teeth? Make sure the cable is set into the pinion gear.

    If its not the gear. Or the cable. Then its the gauge.

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    • #3
      Pull the speedo cable and housing. Thoroughly clean both with solvent and feel all along the cable for any rough spots or burrs. Lube both well, some say lock-ease and I have used silicone grease, and reinstall. If that doesn't help, you might need a different speedo.
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      • #4
        You can pull the transmission end of the cable and connect a variable speed drill for stationary testing. First turn the cable slowy by hand to see if it's forward or reverse before putting it in the chuck of the drill. I've had my display out to clean and lube when cleaning and lubricating the cable didn't fix the problem. It's better now but not completely cured. A serch of this site will bring up other posts where people have fixed the problem by installing a new cable. Mine might have a bit of a kink in it somewhere but not worth the expense of a new cable to see if that cures it.
        Original owner of silver grey carburetted 1989 Festiva. 105k km as of June 2006. 140k km as of June 2021.

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        • #5
          Here are photos. These are for an '89. The photos in the Haynes manual are for a later model. Fastener arrangement a bit different.
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          Original owner of silver grey carburetted 1989 Festiva. 105k km as of June 2006. 140k km as of June 2021.

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