What does firing order for a 1995 Saturn SL2 19 engine what 42 13 mean?

The firing order "1-4-2-3" for a 1995 Saturn SL2's 1.9L engine means the sequence in which the spark plugs ignite in the engine's cylinders. Cylinder 1 fires first, then cylinder 4, then cylinder 2, and finally cylinder 3. This specific order is crucial for proper engine operation and smooth running. It's designed to balance the engine's rotational forces.