99 SE,,,,, # 4 Cylinder misfire...

I checked the coils all check good, swapped two coils to see if the misfire moves (still waiting). New plugs and wires about a year ago.

Could this code be set by a dirty injector?

Like I said just swapped the coils last night and am waiting to see if the code returns.

Thanks
Steve

Pull the plug and let us know how it looks. A plug/wire doesn't have to be old to go bad. Most likely it'* the wire..but could be the plug too.

What kind of plugs? Wires going bad after a year is unlikely, unless something happened to damage them. Plugs, on the other hand, can go bad any time. I had one crack in #4 about a year after installation which caused misfiring. Pull the plug and look for carbon scoring to indicate a crack.

I would definitely check the plugs and wires carefully first before I'd start suspecting the injectors. In the past, I've had both plugs and wires fail shortly after installation.