You can do an ohm test. The FSM says to check the injectors cold ohm readings and then re-check the ohms when the motor gets to closed loop temps. There is a thread here with the method to do the ohm testing thru the ECM plugs.
Are you suspecting the injectors as the source of the miss? A scan of the motor from open loop temps thru closed loop temps will show if you have fuel issues. The O2 cross count #'s and the Block Learn #'s and the Integrator #'s will be off. There is a page in the FSM in section 6E that gives a snap shot of what the closed loop data for a normal motor should look like on a scanner.
Tom