New from North Dakota: P0303 code and cylinder 3 misfire

Just realized this article is for 2000-2004 and I have a 2005. And I have reset the code and started my jeep cold and the code popped back up in less than 30 seconds. This makes me think it has nothing to do with heat but I am still going to put the heat shields on it because it won't hurt. Also didn't get a chance to test my coil pack and I won't be home until tuesday.

Did that fix it