Speedometer recalibrate
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Senior User
Joined: Sep 2003
Posts: 184
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From: pasadena tx.
Speedometer recalibrate
Got an 03' Lightning put taller tires on it speedo is now way off is there a way of recalibrating these all electronic systems got in touch with the only speedo place here in Houston they could not help what ya'll got I know someone is going to chime in and say I should be on the lightning section I see more people putting bigger tires on the 97'-03' 150's than lightnings
Lead Driver
Joined: Sep 2006
Posts: 7,907
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The speedo is driven from the computer.
A dealer should be able to recalibrate the PCM for the tire size but may still not get it perfect if the change data is not close or the tire diameter is not known exactly.
Good luck..
A dealer should be able to recalibrate the PCM for the tire size but may still not get it perfect if the change data is not close or the tire diameter is not known exactly.
Good luck..
Senior User
Joined: Jan 2012
Posts: 145
Likes: 0
Do a online search for Miata.net tire size calculator. That will tell you how much your speedometer is off, either too fast or too slow. That way you will at least know exactly
how much the speedometer is off. Better than a speeding ticket.
how much the speedometer is off. Better than a speeding ticket.
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