Vicra

I just replaced the coil pack and spark plug because of a cylinder 4 misfire(it's what the dealership said was bad). I had a rough idle and a cel, Now I just have the rough idle, but it's not as bad. We'll see if the cel returns.

I have a cylinder 4 misfire and the dealership said it's a bad plug and coil. I'm going to replace the plugs anyway but reading through the forums it seems that there are a lot of issues with the injectors. Has anyone had to replace thier coils? and did it fix the misfire? Or should I just replace the injector instead of the coil, and not listen to the dealership.