| Symptom | Possible Sources | Action | 
	
		| Engine misfire | Spark plug(s). | CARRY OUT a KV test using
		the Ford diagnostic equipment. | 
	
		| 
			Circuit(s).Ignition coil-on-plug(s).PCM.PCM calibration. | REFER to the Ford diagnostic
		equipment. | 
	
		| Engine stumbling | Spark plug(s). | CARRY OUT a KV test using
		the Ford diagnostic equipment. | 
	
		| 
			Circuit(s).Ignition coil-on-plug(s).PCM.PCM calibration. | REFER to the Ford diagnostic
		equipment. | 
	
		| Engine lacks power | Spark plug(s). | CARRY OUT a KV test using
		the Ford diagnostic equipment | 
	
		| 
			Circuit(s).Ignition coil-on-plug(s). | REFER to the Ford diagnostic
		equipment. |