I just put much larger tires on my 2001 Ford F150 4x4. My speedometer is off now. How do I calibrate it myself?
Electronic Speedometer calibration
Nov 20, 2003
2 Replies
you don't
you take it to the dealer, and if.......IF..........the tire size that you put on is within the limits of the ECM programming, it can be 're-flashed' to make the speedo read correctly
you could also get one of the superchips micro tuners, they allow you to set the tire size. Plus they are a code scanner, plus they supposedly give better shift patterns and a little bit of power.
Never used one myself, but I hear they do a nice job on the shift points.
l8r Jeff
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