Hi all. Last saturday, when I turn on my car it feels like its gonna die then a check engine light went on. Scanned them and it says P0304 Cylinder #4 Misfire. Changed the spark plugs but a day after the same code appeared again. Would it be ok if I swap the coilpacks to see if I need a new coilpack? I have a 2004 with 38,000 miles. Anybody have any suggestions?

 

yes, imo thats the best way to test it. this is how i solved my problem. ended up with a fried pack.