I can't seem to find cylinder numbering for my engine anywhere. I know it goes 1-3-5-7 and 2-4-6-8 but what side is odd and even on and are 1 and 2 in the front or back?

I have a cylinder 3 misfire and I changed plugs and swapped coils where I think cylinder 3 is and it still stays on cylinder 3 but only at idle. Injector issues?

 

The left side is 1 3 5 7 and the right side is 2 4 6 8 from front to back.

 

That's what I figured. So I swapped wires and coils with cylinder 1 and changed the spark plug but still get a misfire on 3. Think it is a clogged injector or something? A vacuum leak would make a random misfire on all cylinders right?