The B1366 Code appears for the error of engine. The code B1366 may appear for different possible reasons and for this problem. It is not necessary to change any parts. The code tells that the problem is related with body. The firing order is a vital part of the general design of the engine and is resolute through the design of the engine to remove as much engine trembling as potential. If the firing order is adjusted, the explosion from the spark plug is distributed at the incorrect time and the engine purposes do not run. The firing order for a specific engine is normally found in the repair manual exact to that model.