What is the firing order for Volvo 740 turbo?

on the engine block the order from the back to the front is 4321 but you will plug them in to the router like this. As the far left is 4 and the far right is 1. So from 4 on the engine to 4 on the router, from 3 to 3 on the router, then it switches from 2 on the engine to 1 on the router and finally from 1 on the engine to 2 on the router. So the router order should be 4312.

Hope this will help