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Speed off by 1mph

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Old Mar 9, 2024 | 07:49 PM
  #16  
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Sorry, speedo reads 1 mph high. I guess I'll learn to live with it since it is fairly common. I don't think it is worth getting Forscan for the speed issue, now if something else pops up, I'll take the leap.

Thanks for the replies!
 
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Old Mar 9, 2024 | 08:09 PM
  #17  
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Never been in a vehicle that the speedometer is dead on accurate to the GPS, only off by 1 MPH isn't bad at all.
 
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Old Mar 9, 2024 | 10:17 PM
  #18  
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I used ForScan to adjust my tire size so that my speedometer and Waze are just about dead on. Yes my OCD won. 😜
 
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Old Mar 9, 2024 | 10:19 PM
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Originally Posted by Bad Moose
Ok, here it is and it drives me nuts. My 2024 speedo is off by 1 mph as compared to gps speed from Waze, Google maps, Apple maps, or speedometer apps. This truck has just over 5000 miles on it.

The odd thing is that my 2020 was the same way, I though it was tires and when I replaced tires it was the same result.

Interesting but what is the cure to make them match?
The cure is to throw the GPS out the window, and pay attention to the road.
So who says the gps is correct. Up in SE Montana there is a road named “Bay Horse creek road”…..that is what the sign says. I have yet to see a gps get it right. On GPS it is named everything from “Bowers Creek road” to “Bayers creek road” to “Bears creek road” to God only know what.
I had a neighbor that had to put a sign up in his driveway stating “Turn around dumbarse, your GPS is wrong” because lost people were driving into his yard all hours of the day or night.
 
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Old Mar 10, 2024 | 12:48 AM
  #20  
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The things people have time for.
 
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Old Mar 10, 2024 | 05:50 AM
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Originally Posted by Bugzilla46310
Either slow down or speed up until they match.
OK, I laughed a little at this one...

 
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Old Mar 10, 2024 | 08:49 AM
  #22  
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Originally Posted by sbechtold
I used ForScan to adjust my tire size so that my speedometer and Waze are just about dead on. Yes my OCD won. 😜
As an Old Wind Mill Tilter myself …. I applaud your tenacity!
 
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Old Mar 10, 2024 | 09:22 AM
  #23  
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Go up one inch larger tire diameter and it usually zeros out the speedometer and it will be correct.
 
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Old Mar 10, 2024 | 09:33 AM
  #24  
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Most people out here drive the two lane highways at the speed limit. There’s no need to pass anyone and no one holds anyone up that way. Nice and safe! An accurate speedometer is needed to set the cruise control at the speed limit.
 
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Old Mar 10, 2024 | 10:24 AM
  #25  
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As your tires wear, it's going to get worse!! I'd start worrying about it NOW.
 
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Old Mar 10, 2024 | 10:56 AM
  #26  
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I recall Motor Trend car reviews in the 80s and 90s had all the tech specs about the car, including speedometer error. It’s the nature of the beast.
 
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Old Mar 10, 2024 | 07:13 PM
  #27  
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Originally Posted by Desert Don
The cure is to throw the GPS out the window, and pay attention to the road.
So who says the gps is correct. Up in SE Montana there is a road named “Bay Horse creek road”…..that is what the sign says. I have yet to see a gps get it right. On GPS it is named everything from “Bowers Creek road” to “Bayers creek road” to “Bears creek road” to God only know what.
I had a neighbor that had to put a sign up in his driveway stating “Turn around dumbarse, your GPS is wrong” because lost people were driving into his yard all hours of the day or night.
And that has exactly what to do with speed calculation via a GPS?
 
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Old Mar 10, 2024 | 07:18 PM
  #28  
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Now I am inclined to go check my GPS again.. !!!
 
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Old Mar 10, 2024 | 10:05 PM
  #29  
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Gosh I hope the tachometer isn't off a couple RPMs too.
 
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Old Mar 10, 2024 | 10:37 PM
  #30  
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Originally Posted by B-ManFX4
And that has exactly what to do with speed calculation via a GPS?
absolutely nothing…….except to point out that a gps can be WRONG!!!!!!!! But nope, that is impossible, huh!

 
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