That's usually true (but not always). It's the momentum from higher RPM that does the damage, so your starter might have been spinning the engine at maybe 200 rpm. That's usually not fast enough to bend a rod.

For the injectors, each one is supposed to get (+) battery voltage from the main relay as long as the key is turned on. The ECU closes & opens the ground side of the circuit to fire each injector. Remove the pin(s) for whatever injector is flooding, to see whether the injector continues to spray. You should be able to make the injector fire by shorting it's ECU wire to ground. There's probably still an injector circuit that's wired wrong.