too many cooks spoil the brew
one that had the original problems and tried to solve it
the second, partly knowing the original problems, tried to solve it,
the third, knowing ??????, tried to solve what was left of it

RCU to the resque.

Get down to the basics, as if no other person has meddled with it.
1) does it spark?
1A) is case compression ok?
2) does it get fuel up into the cylinder? (tricky question)
3) is compression ok, so the fuel will ignite?

if all is yes, the engine will burp!!, and further investigation will center on :
1) continued fuel supply (pumping action, debris inside, tank fuel lines issues)
2) ignition firing sequence (ignition good, or bad)
3) ignition timing


If all of the above is OK, the engine will run, and can be tuned to best performance,