In preparation for my dizzy flash tune I went ahead and changed the plugs for pre gapped ngk's (one step colder). There was a bit of oil on the coil packs for cylinders 1-3 but nothing excessive. However the car is misfiring at idle (sounds awful) and is throwing a p0301 code. I swapped out the plug in cylinder 1 and still no luck. I'm lost boys. My car is a 2017 with 37k miles.