I had been running the v301 maps (stage 2 aggressive) since I bought my cobb a few months ago, no problems whatsoever.
When v401 maps were released I of course upgraded and ran those. Within a few minutes I was getting misfires, for the first time.
So I went back to v301, same thing but less. Stock map was fine.
Changed the 1 coil (cyl 1) and have been running v301 for the last 3 months again without issues.
The other day I thought I'll give v401 another try and the same thing! (cyl 6)
Can s.o. please elaborate why v401 is making my misfires appear...?
I'm at 54k, downpipes, dci, PE exhaust...