While driving lately my Z1 has my postion behind my actual position on the road. For example I will have made a turn and the Z1 shows I have not made the turn yet. I have used the modify present position option numerous times and the next time I get in the car, I have to modify my position again. Any help fixing this is greatly appreciated.

VSS hooked up?

This happens right after you start up your car and take off before the navigation fully loads right? Sounds like you arent getting your full gps signal yet. once that kicks in, can take as long as 2-3mins, before it readjusts itself.

VSS is hooked up. I've had the unit for nearly a year now and this has only been a problem for about a month.

Coocho are you suggesting I wait to drive until the gps is fully loaded because if this is simply when the map is accessible, my unit typically only takes about 30 seconds to load.

Thanks for the responses...