My local tech, (Steamboat Motorsports) replaced lifters and cams on my problematic A4 and informed me he advanced the intake cam. P0299 popped up on my test drive and the car had NO power whatsoever. I contacted APR, (Outstanding customer service by the way), they said that the cam should not have been advanced. I had them put the cam back to it's stock location and the problem was resolved, although he insists this can be done. Can it?