Car won’t start after stalling out. HELPPP

My car won’t start. I was driving and it loss all
power as it would not accelerate anymore. Every
warning light came on. Had it looked at by several
mechanics. First it was thought to be the fuel
pump or crankshaft sensor (not the problem) It
was also thought to be the fuel injection relay and
spark plugs but a mechanic said it’s not that either
and it may be the key but we had different keys
tested and that wasn’t the problem either. Now we
are stuck with thinking it’s the wiring in the ignition
cylinder.  No one has a positive diagnosis of the
problem.  The car starts now but cuts back off
after a few seconds. The fuel pump works the
battery has been charged. Crankshaft sensor have
been replaced. Pep boys conducted diagnosis of
the car and still no answer