Hi Larry, I had a similar problem a few months ago (off number 3 cylinder) it turned out to be a simple solution, replace a defective NGK plug. The bottom end came apart and closed the gap to zero, hope your problem turns out to be the same, and your back on the road after fitting a new set of plugs. The hot climate in your country possibly made matters worse, and the fact that you may have 2 defective plugs, doubling your problem.
Regards
Davy
David Selfridge