Originally Posted by Imperator
I've seen a good number of recommendations to change plugs on 20K intervals with a tune installed. I kept getting misfires on cyl 1 during cold starts, to the point where the car would stutter and illuminate the CEL at low loads. New plugs resolved that issue completely, no coil swaps needed.
Tune hasn't been installed but maybe 2k miles. Pretty sure it's gonna be the coils, but still have plugs as an option. This issue only happens with the tune installed at WOT.