Z32 Missfire possible ptu issue

I replaced it becuase the old injector wasnt working. The only thing i did was check the injector with 12v (probably shouldn't have done that)

How can i check the wiring? Should i trace it back to the ecu with the pinout

 

Btw it's a second hand injector

 

Try swapping a your new injector to a different cylinder to see if the miss moves.

If the miss doesn't move it could be faulty injector connector, problem with wiring to injector or injector driver in the ECU.

 

Ok thanks i Will check

 

thank you to everyone for their help!

turned out to be an failed injector driver . possibly due to/and the bad wiring(corrosion)