Defective head gasket or other parts led to coolant entering into the engine and causing the engine to sputter and seize. The car randomly started hiccupping while driving and would rock back and forth when trying to accelerate. The car would launch slowly from a start and made a right turn on red risky. The problem has been confirmed by a Ford dealer. The mechanic said this is a ‘known problem’ with these engines. This problem/engine, however, is not covered under warranty. The vehicle was inspected by a Ford dealership. There was a check engine light 3 days prior with no symptoms. The code came back with a cylinder 2 misfire. I made an appointment for the closest day possible. After 2 days, the car was a bit shaky and the unusual vibration was noticeable. On the third day, there were issues with power delivery, the sputtering became audible, and the shaking was intense. I brought my car into the dealer immediately.