Coolant leak caused head gasket to leak on cylinder which consistently washed the car’s spark plug. This caused the cylinder walls to become washed out which has caused significant damage to the car’s engine. The consistent washing of the spark plug has caused the car to not be able to accelerate beyond 20mph – 45mph. This is a danger while driving on main roads as well as the highway. The car has also overheated because of the problem, causing the car to not start as well as to stall. The check engine light typically blinks or stays idle before the issue occurs. The vehicle was first inspected by the car dealer that sold me the car, because the check engine light was on, they stated there was nothing wrong with the car. A Tire Plus mechanic did a diagnostic and discovered the spark plug to need replacement. Most recently, the Ford dealership has given the most recent diagnosis, stating the engine needs to be replaced.