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  1. #1 Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    Ok I noticed while on the interstate that I noticed my speedo said like 75 mph and gps said like 72,to go 55 I got to go almost 60,I tested with 2 phones and my garmin, all said the same thing, how can I get it to read right?

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  2. #2 Re: Speedometer misreading 
    I live here. stealthee's Avatar
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    Do you have the right size tires on it?


    2011 Mitsubishi Lancer GTS - DD mode
    1991 Mitsubishi 3000GT - Many mods to come
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  3. #3 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    Idk I'll look tomorrow,I bought the car with them on it

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  4. #4 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    P225/60/r16

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  5. #5 Re: Speedometer misreading 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    I wouldnt worry about it, 75 is already over the limit and I bet people are still passing you.

    A GPS "can" be more on target for speed, but figure the car is over 12 years old and not as good of quality as a new car.

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  6. #6 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    I know I was just wandering if it was fixable just trying to work the kinks out of the car, it does it at any speed, I had it at 55 and in reality was only going roughly 52,I'm going to see if a cop will radar me later just to see, I about know what to figure now

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  7. #7 Re: Speedometer misreading 
    Moderator Russosaur's Avatar
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    Mine does that, but thats because I'm running a 225/55 tire. Maybe its something with your tires.
    2019 F150 XL - Make it run 12's N/A
    2012 F150 STX
    - Gonna be a race truck
    02 GT "Slowkar" 180k - Top Swap, Gen V, TOG Headers, 1.9s, e85, 3.25. It's literally the slowest e85 car ever....

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  8. #8 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    My size is up there^^^

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  9. #9 Re: Speedometer misreading 
    Moderator Russosaur's Avatar
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    I know a I saw, but I had 4 different 225/60's before the tires I have now and they were all I swear different widths and such. Looked stupid.
    2019 F150 XL - Make it run 12's N/A
    2012 F150 STX
    - Gonna be a race truck
    02 GT "Slowkar" 180k - Top Swap, Gen V, TOG Headers, 1.9s, e85, 3.25. It's literally the slowest e85 car ever....

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  10. #10 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    Mine are all matching but old car or not if it's not the tires something is causing it

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  11. #11 Re: Speedometer misreading 
    Moderator Russosaur's Avatar
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    I'm sure I'm wrong but, you can probably open the cluster and move the needle if i you wanted it spot on. I know people have to do it for 04+ needles
    2019 F150 XL - Make it run 12's N/A
    2012 F150 STX
    - Gonna be a race truck
    02 GT "Slowkar" 180k - Top Swap, Gen V, TOG Headers, 1.9s, e85, 3.25. It's literally the slowest e85 car ever....

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  12. #12 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    To think of it sometimes when I start it the mph hand will jump to 75 mph or that area and go back down and rarely the rpm hand won't move until you peck it so it may be dieing

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  13. #13 Re: Speedometer misreading 
    Moderator Russosaur's Avatar
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    Maybe but 3-4mph isn't that big of a deal. As long as you compensate for the difference.
    2019 F150 XL - Make it run 12's N/A
    2012 F150 STX
    - Gonna be a race truck
    02 GT "Slowkar" 180k - Top Swap, Gen V, TOG Headers, 1.9s, e85, 3.25. It's literally the slowest e85 car ever....

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  14. #14 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    My dad said it's something with the rebuilt transmission probably

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  15. #15 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    Ok my dad borrowed my gps and he said it was off about 2 mph or so in his truck and so mine may not be off

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  16. #16 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    I guess I'll get a cop to radar me lol

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  17. #17 Re: Speedometer misreading 
    Donating Users Bronco Boy's Avatar
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    GPS isn't 100% accurate, nor is your speedo. If you are within 1-2%, move on to the next problem.
    Chris B
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  18. #18 Re: Speedometer misreading 
    Turbo is the way to go. BillBoost37's Avatar
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    Was your car ever modded? Someone could have changed the tune.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  19. #19 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    I'd say not billboost37

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  20. #20 Re: Speedometer misreading 
    GTX Level Member 94grandprix's Avatar
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    Bronco boy my biggest problem is the ac

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