996 Miss Fire on Right Bank, After Left Bank Coil Change

[McSwerve II]

Evening all. A coil failed last night in my early 996. As I had a spare I put it straight on (left hand side).

After a quick test drive all seems well, but then the CEL came on. After reading the fault codes its showing misfire codes on all the right hand side cylinders.

Any thoughts? I’m probably going to start with the plugs and coils on that bank, but I’ve been reading about Variocam Solenoid failure, as its to the one bank.

Seems strange its happened after doing something on the other bank though.
Any thoughts gratefully received.

[McSwerve II]

Thanks for the input.

I ordered new coils and plugs last night. This morning no check engine light!

I’ll still swap them all out though, as the others I could see looked on their way out.