Chrysler Repair: chrysler 300c 5.7liter, chrysler 300c, roland

Question
code said that it had a misfire on number 4 valve. change wires,plugs,corepack, code is the same.

Answer
Hi Sam,
I don't have a manual for that engine but the only things remaining are a mechanical issue with the cylinder (so for that you might do a compression measurement to see if it is up to spec or within 25% the others) or its injector being clogged/leaking.
Roland