This means that the spark plugs fire in that order, starting with cylinder 1 and ending with cylinder 2.
Here's a breakdown:
* Cylinder 1: Frontmost cylinder on the driver's side.
* Cylinder 3: Rearmost cylinder on the driver's side.
* Cylinder 4: Frontmost cylinder on the passenger side.
* Cylinder 2: Rearmost cylinder on the passenger side.
This firing order helps ensure smooth and efficient combustion in the engine.
