Just caught your edit.
No worries, I get's lots of practice troubleshooting idle issues on these cars /ubbthreads/images/graemlins/smile.gif
I have also had some trouble reading the vss on a logger. There are several different software variations in the programs available for datalogging, and some of them might not support this function. I know the vaule is under vss, and you;re just looking for any activity, not a specific number.
I usually just use my snap-on mt2500 scanner (the brick) for this particular data point, as it will show the actual vehicle speed.
I think Mike's got your fix. /ubbthreads/images/graemlins/cool.gif