Rod, I just installed a PCV two days ago and fortunately for me, mine worked OK after the install. I'm trying to think what your problem could be since you uninstalled the PCV and you still get the FI indicator light. The problem started when you completed the PCV installation. Assuming that you made all of the connections correctly, I'm wondering if you pressed the connectors together until they "clicked". For me, this took a lot of force in a very confined work space and was difficult in some cases (especially cylinders 2 & 3 in the middle). So, when you returned it to stock are you sure the connectors are secure? If you accidentally bent a connector pin so that it didn't mate with the female side, I'm sure that would cause an FI error and you probably wouldn't have been able to seat the connectors until you heard or felt the click. Maybe you should check each connector to insure that it is fully seated. If you find one that isn't, disconnect it and check the male pins. Also, when you returned the bike to stock, did you remove the O2 Optimizer and reconnect the original connectors?
Rod, if none of the above helps and considering how difficult it was for me to disconnect most of the connectors, I think it is very possible that you partially dislodged a connector wire from one of the many connectors and that may be a difficult thing to resolve. That would also explain the FI indicator after returning the bike to stock. In that case, I think I would raise the tank as much as possible, turn on the ignition, and, as best you can, push each connector wire into its respective connector while watching the instrument panel (if that's even possible). Maybe the FI error would clear when and if you fine a loose wire.
I'm probably rambling so maybe someone else has some suggestions. I'll continue to think about it. Good luck.