Originally posted by Tony2005:
With the new VSS in, try pulling Fuses 4 and 11 to relearn the computer (just in case).



yeah i tried that already...

Originally posted by Ray:
a percentage difference would indicate a change in gear ratio, or overall tire circumference. (rim/tire height)

If it is constant then I, too, would look for the speedo needle to be loose from its point.

Ray



I bought this car in nonworking condition, so I don't know if the speedo ever worked right. I just put 225/50/16 tires on the stock rims..but that wouldn't throw the speedometer off 10+ mph would it? It does seem to be linear, though seems to linger a little in the 20-40mph range.

I read in previous posts that the VSS sends out 2 signals, 1 to the PCM and 1 to the gauges. Since the OBD2 software was reading the correct speed then that would indicate the sensor is ok and something is wrong w/ the gauge. Maybe the needle just needs to be re-calibrated?

Black E0 SVT