Hi guys I've just started getting a misfire code about a week ago on my 2010 with 40k miles, the code will start for maybe 10-20 seconds and it is completely random when it comes on and off. The code does not show up on either one of my scanners. I have tried changing out coils, plug wires, plug, and cleaned my maf aswell and nothing seems to help. It does run a little rough when cold which its always has. but warmed up doesn't have many issues at all. Under 2k rpm it will be a little rough running sometimes.
If anyone has any seguestions of anything to look at or try is very much appreciated.