Firing order question????

[AmsterDutch]

When code for cylinder 3 comes up with check engine light does that mean change the cop and plug in 3rd cylinder or the 3rd cylinder in firing order diagram? I’m changing all cop’s and plugs but internet has me questioning this, due to so many different opinions?

 

[joegr]

It always goes by cylinder order, not firing order.

 

[AmsterDutch]

It always goes by cylinder order, not firing order.

Much appreciated.