The car has been running bad. Have replaced fuel pump .fuel pump relay. Wires. Plugs.cap.rotor.the dealer replaced factory recall ignition. Still had flashing CEL. I had engine running and pulled off #4 injector wires off. It sparked off fuel rail. Killed motor now wont start. And have no immobilizes light or CEL.What did i screw up? Broke down on side of road blues.with few tools .HELP

 

Recently inherited this car from my mother after buying her a new car it has been running poorly I have replaced fuel pump fuel pump relay plugs wires cap rotor dealer just replace recall ignition had to catalytic converter removed just put in non-ethanol gas started running bad again pulled off one injector wire off of number for while motor was running it arced across the injector rail motor died instantly will not start again no immobilization light or check engine light