Are you running any ECU patched code such as Tephra or closed loop AFR patches?
I see you have a Sparktech COP, how long ago was that installed?
Do you have anything wired into the ECU such as a wideband or boost solenoid?
Did I also catch that you bypassed the resistor on your injectors?

 

Tephra -- Isnt every one?
On this car? Few months.
No.
Yes - Resistor is eliminated.

 

Could be a dead spark plug..

 

Plugs were changed - twice.