If you're still getting the same cylinder 5 misfire code, try swapping the coils around with cylinder 6. If the misfire code changes, you've found the problem. If it doesn't, repeat the procedure with the spark plugs and, if necessary, again with the injectors.
2006 GT Deluxe - 5MT - 12.50 @ 109.61
314rwhp 330rwtq with basic bolt-ons