Hmmm, Yesterday (2/23/2016) my 2006 V8 with 87,7xx miles on the clock was on the way to the dealer for 90,000 check up. After a brief stop, it started making a clicking sound when i started it. The engine had a really rough idle at a red light and the check engine light started blinking. As the RPM's picked up, the engine light would transition from flashing to steadily staying on. As the RPM dropped, it would run rough and flash. The Dealer is telling me the cam tensioner on one side broke and i am looking at a minimum a $3,700 repair and there could be more problems once they get inside.......All service has been at dealer on schedule including the timing belt replacement at 80,000 miles. The service rep suggested i may want to trade it? Seems like quite the failure for an engine with so few miles. I don't know what to do......,.