Ok my 08 has 10,000 miles on it and now it's making the tapping sound and at full throttle the egt's get up to 1250 and the turbo's stop spinning like it's on a limiter. this is before the truck gets up to 60 mph.:dunno: Has anyone else had this problem? The only thing that I have done that I thought started the problem is in a regen I shut the truck off :doh: not thinking about it. oppps on me now this is my problem.