Having same surge, hesitation, herky jerky acceleration problem and saw this about the plugs so thought I'd give it a try. Oem gaps were .031, .029, .030, .031 so I reset all to .028. Although with a smaller gap the spark is also "smaller" and a bit weaker and maybe won't burn the fuel as efficiently. What I noticed was a slighty rougher idle. It still surges some but maybe not as bad. I'll have to give it a another week or so before I'm sure if it's helped or not. If not I think I'll try going a little bigger on the gap, maybe .033 or .034 and see what happens there. The pic is oem plug after removal before re-gap. Did not clean (maybe I should have?) just re-gapped and put back in. Will pull again in a week or so and see if any changes in color, deposits, etc.
Cruisin'.........ondflo.