Engine Noise problems of the 2011 Ford F-150

At 10k blowing black smoke, lose power when passing at 10k also, check engine light at 40k. Dealer found nothing wrong and cleared code and check engine light went off. At 54 k engine ran rough and wanted to stall, began to make noise. Towed to dealer. Timing chains went bad and bent valves. Dealer said 10,000 dollars for new engine. I talked to Ford and they said nothing could be done. Dealer said to call them again. They said nothing can be done again. Next day dealer called and said they would do the engine for 5643. 00 dollars. The truck only has 54,000 miles!.

I was merging into traffic after picking up my daughter from daycare. I pressed down on the accelerator firmly to gain speed to get into traffic. My truck stalled with a pinging noise coming from the engine and an uncharacteristic black smoke pouring out of the exhaust pipe. Oncoming traffic had to brake to avoid hitting my truck on my daughters side. The truck recovered but only gradually picked up speed with very little power. It was a low constant acceleration. This is the 4th time this has happened with my truck but this time it endangered my daughter so I feel that I need to speak out. This needs to be addressed before my 1. 5 year old daughter or someone else gets hurt due to faulty equipment.

I have been having problems with engine noise ranging from a deep howling to a sound like a steel chain being drug over an aluminum ladder. I have had problems with the sync, memory seats and steering wheel, auto start, and an ongoing problem with hesitation or miss firing in the engine that cause the truck to loose power on acceleration and go into limp mode. I have had some really close calls getting onto the highway where I was almost hit from behind when the truck lost power. I have had the truck in the shop 13 times and getting ready to go back for the 14th time. I have tried the bbb and the lemon law program which I was denied by a third party arbitrator. I was expecting that because a bbb employee said 93% of all people that file a lemon law claim in missouri get denied. I have an extended warranty with 50,000 miles left on it and the Ford engineer in charge of repairs says he refuses to do anything about the engine noise anymore because of the past failed repairs. This is an v6 ecoboost . I don't know what to do next.