Vehicle misfires. I have taken this vehicle to my mechanic for the same issue 3 times. Each time it has be diagnosed as cylinder 3 problem. My mechanic did an investigation and found that this particular engine has been identified as a problem motor with coolant leaks into the motor, causing failure in the cylinders. Ford has not issued a recall but is aware this is a major issue. I have to check the coolant constantly and there are not leaks in the coolant system. Mechanic has stated the only way to fix the issue is to replace the engine.