Nope, doesn't help me. Still backfires, have change plugs 4 times but only when topped off. IDGAF about it though.Just to update (since I said I would), I've filled up... well more times than I'd like to admit since my original post and haven't had any backfiring. I don't know if it's the colder plugs or the 0.031 gap, or the combo of the two, but that's all I changed. I also don't know why it only occurred on a full tank... but if you have the annoying backfiring might be worth throwing in a set of colder plugs gapped at 0.031 and see if it fixes it for you too. Hope it helps someone else.