Did you do a compression test,with a piston style tester?

I personally,never heard of flooring it while starting will work.Unless it cuts the injectors off (since you dont need to pump a FI car,like a carb to get fuel in)

N/A plugs and TII plugs are the same,BUR7EQ/BUR9EQ
You can get them in diffrent heat ranges.I run FC style plugs in my first gen.They are sealed.. and suppose to be "platinum" but rotary engines produce so much carbon.I clean mine once a week or every 2 weeks to keep them clean.Pre mixing,running to rich,out of timing.. will make plugs wear/foul easy