Update...

After some EWSII research, I figured it's not an immobilizer issue.

Today's findings:
Went out to it an hour ago, turned the key and hesitantly, she fired up, ran perfectly and then developed a misfire.
Tried to plug in the diagnostic computer but the interface isn't showing any life from the car, so I did a comparison check with another car and it showed life once connected. Now I used the exact same diagnostic computer last weekend and found the "Key Transponder 2" fault. So it's leading me to think it's an ECU issue or possibly a wiring issue to the ECU??