I need some help guys, last nite while attemping a launch (in a closed area) i reved to the two step as i have done so many times without incident. after about 3 seconds, the 5500 rpm rev limiter let go and allowed the engine to rev violently right to redline while the clutch was still to the floor. I was running cobb stage 2 at the time. I flashed back to stock and tried it again at it is happening everytime. What causes this?