The vehicle Blew a spark plug while driving. It took place right as I attempted to accelerate up to highway speed of 50 MPH. When I had it checked the mechanic said the number 3 plug was blown out and I had a busted injector. Vehicle mileage is 164k. The repair was over $1100.00 with none being covered under my full coverage insurance policy. I need to let others know what to expect from their Ford vehicle... Found out that this is a frequent problem with Ford Engines 5.4 Liter V-8..