0.027-0.028 is the gap
Later reply, you check the condition of the springs and resisters? people with this issue ended up needing a new coil pack. I'm on lucky #3 at the moment. Pulled it a week ago prior to the snow and it looked fine on the inside.I set mine at .025. They'll expand to .029 and start running wonky. Then regap them down again. Mine are the copper though.