My Teg is acting real strange lately. Sometimes when it's idling, the RPM's go up and down, up and down...Sometimes it stalls...Other times it idles fine. I checked all my connections and everything looks OK. Last night I was sitting in a parking lot, and it stalled. When I started it back up, I got a check engine light, and some strange noise underneath the car...Like the cat blew or something.Also my VAFC screen went blank, but the orange lights were lit up. I turned the car on and off like 4 times, and the check engine light went away. The VAFC also returned to normal. I just got the car dynoed on Friday with the cam gears set at 2,2. What could be going on?????