Spoke too soon. Worked perfectly on three long rides last weekend. First ride today getting constant right pedal missing messages and dropouts. Near end of ride got low battery message on 1030 so changed the batteries for first time using the spare batteries that cam with the vectors. Did another ride and and seems they have turned into a random number generator. Two rides, two lots of useless data. Really not fit for purpose.
I am also experiencing the same issue. I just recieved a new set of Vector 3 pedals. I have mounted them on a clean crank and with the right tension. Any solutions found?
I suspect that Garmin doesn't always get the install angles right on the Vector 3 pedals. I have also had the L/R balance bounce around between different bikes. Each install was done with a calibrated electronic torque wrench, reset install angles, calibrate, calibrate again. The bikes have identical setups and seats. Still sometimes I'm right dominant, sometimes I'm left dominant. Check, if your power phase angles bounce around in line with the L/R balance.