Well you need clear that #2 injector driver problem. 1st read voltage fed to that injector: here is the circuit:
http://www.geocities.com/lmp4203/kia...tordrivers.jpg
Disconnect plug to injector #2 and read voltage: on one wire with key ON, you have 12V. On the other wire, white green stripe ,you have "undertermined voltage"...that is, is is supposed to be an open circuit anf the computer driver connects that wire to GROUND only when injection is required. A RESISTANCE check to ground should read infinite ohms..or a very high resistance. If it shows low resistance to ground of that 2nd wire (key ON or OFF) ...like a few ohms, then the driver is shorted (injector circuit LOW) and this is the problem. I have not investigated this driver: can be a removable discrete transistor that then can be replaced, or a transistor bank (several together), a little more complicated....or imbedded and epoxy sealed in the PCM...bad news. You can have a wire shorted to ground too....
Come back with results for that test.