MontanaHandyman
Senior Member
Burla, would swapping the coil packs be necessary on a 2014 5.7? I'm not sure if mine came oem with iridiums...run the codes, it might isolate the cylinder. p0301 would be 1, p0302 would be 2, etc. To properly run iridium you need to swap coil packs. Either upgrade coil packs or go back to nickle.