you can take it out and let autozone test it. In my case, the injectors were not pulsing. I had a new ICM. take a test light, ground it, probe both contacts on the injector plug. If you have a steady light, unplug the 4 pin at the base of the ICM and retest. If the light is blinking, injectors pulsing, it means the ICM is whacked. Sure enough, another new ICM and I'm getting fuel.