Set the timing as described halfway down the thread: http://thirdgen.org/techbb2/showthre...ghlight=timing
You want to do this so the reading from your timing light matches the signal the ecm is sending to the distributor. Once set, repeat the way you where revving it up, and see if the timing indicated on the balancer is the same as what is shown in the timing screen on your laptop.
Is this the "stock" timing curve or an unknown one. In the thread above is a link to all the stock gen6 programs. You might want to save your timing program and download the original to compare.