Recalibrate speedometer with efilive

[Adams2591]

Hello
I'm wondering if I recalibrate speedometer for smaller tires will I lose my tunes. I brought the truck with efilive and have no clue who tune it. I like the tunes and don't want to lose them. Thanks

 

[Burn Down]

Are you changing it with EFI or something else? Pretty sure your not going to lose your tune unless you take it to the dealer and they flash it back stock.

 

[DAVe3283]

If you read out the existing tune then modify the speedometer in that, you won't lose it. Just hope the previous tuner didn't lock the ECU. If they locked the ECU, it is very difficult to get the tune out.

Sent from my FlashScan V2

 

[Adams2591]

Thanks