Cylinder not Firing

[foxmustangman]

Okay so my #5 won't ignite. I just end up with gas spilling out of my tailpipe. I know its this cylinder because it stops when I unplug the injector. I have spark so I'm guessing that there's just too much fuel for it to ignite. I also know its not the injector because i switched injectors for a new one.

Obviously electrical? But how? What can i do to solve this?
Thanks

 

[HISSIN50]

Check to see if the injector is being constantly energized. If so, look for pinched (to ground) injector wiring.

Also pull the plug and make sure it's not broken or damaged.