I am having an issue with my 94 LS Automatic. It shift into 2nd too quickly and has no power until you get rpms up. The check eng lite came on and we got it off by replacing the anti knock sensors and cam angle sensors. Lite is out, but still no power. It runs well on highway when you are up to speed. I am not sure if tensioner slipped or I have a computer error, but thought I would ask for help before I removed cam covers. Any thoughts?