Hoping someone could give me an idea of what is wrong with my truck. 2011 Ram 1500, 67000 miles, have a cylinder 4 misfire. A little backstory, noticed the idle was rough for a day or so and then the CEL came on. Read the code and cylinder #4 misfire. Only notice the misfire at idle, higher rpm's are fine, no loss in power. Over 1000 rpm almost feels like there's no misfire at all. Plugs were done at 50k, checked and all good. Changed the coil and injector, reset the code and CEL stayed off for about 5 minutes before coming back on. Taking it to the dealer next week but willing to try any suggestions before hand to avoid dealer diagnosing charges.