* For the 2.3L Quad 4 engine: The firing order is 1-3-4-2.
* For the 2.5L engine: The firing order for this engine is 1-2-3-4.
It's crucial to know which engine is in your specific 1992 Achieva to determine the correct firing order. Check your vehicle's documentation or the engine block itself for the displacement (2.3L or 2.5L).