Help CEL on and ECU throwing code 45

[DanDriftS13]

The car is a S13 hatch with a stock KA24DE in it. Ever since i got this car about 4 months ago it hasnt ran completely right. When i first got it it wouldn't pull smooth through the rpm range and would give a bit of trouble starting when it was hot out after the motor has been warmed up. Now the problem has gotten worse and the car bogs out and misfires if I push the throttle more than about 25%. Still gives the same problem when starting when its hot out and the motor is warmed up.

So here is what I've done so far.
I check the ecu for codes and got 34 (knock sensor), 43 (tps), and 45 (leaky injector).
First things first I had a brand new knock sensor laying around so I went ahead and replaced and the ecu still wasnt reading the knock sensor. So i then checked the wiring and found the ecu wasnt receiving the signal so I bypassed the harness and wired the sensor to the ecu.

Next was the tps I checked the resistance of it and noticed that it wasnt inside the parameters for a good check out so I decided to replace that too. With the new TPS on the car is still acting exactly the same.

Now to the code 45. Everything I can find says that this code is for california cars only (I am in Orlando, Fl). So my question is because my car is throwing this code should I just assume that the car is a california car and go with that as my problem? If so what can I do to diagnose a leaky injector.

The car idles normal, hesitation when throttle is pushed, and bog past 25% throttle. My fiancee also has a s13 hatch with a dual cam in it so I am going to try the injectors off her car and see if it changes anything on mine. But what else can I try if that doesn't change anything?

Sorry for the long post but any help is greatly appreciated.
Thank You
-Daniel

EDIT* Forgot to mention that the CEL only started to come on yesterday. And it is not constantly on. It will come on completely and stay lit sometimes and then when I press that gas harder or let off it goes away for a few seconds and comes back or stays off for a little bit. Other times it will come on and flash fast like its a strobe light almost...