reason I asked for the firing order is because I got a P0306 Code and description for that is "Cylinder 6 Misfire Detected." Isn't spark plugs firing order corresponds to each cylinder? If not, I need the location of the cylinder. Also, If you have an idea of which I need to look on first, for the issue I'm having, I'll really appreciate that. The vehicle all of sudden started shaking and lost power. I was even pulling a boat when it happened. It runs so bad in low rpm and will smooth a little bit out and be driveable with high rpm (atleast 2500 rpm). Went to AutoZone today and they lend me their scanner and I got P0306 "Cylinder 6 Misfire Detected." I haven't start doing anything yet, but leaning towards the spark plug, then the coil. But I can't even find the spark plug and don't have a trace as this engine (V8 5.4) don't seem to have a regular spark plug wires. If someone can also help me locate where the plugs are, it will be highly appreciated. Thanks.