Originally Posted by
statesman
Sometimes injectors can stick shut if they've been sitting around not being used for a while. Try connecting 2 wires to the suspect injector... connect one of the wires to 12v positive of the battery and then tap the other wire briefly on the battery negative while listening for the injector to click. If you don't hear any clicking of the injector, then try tapping the wire on the battery terminal a few times with each tap lasting about half a second. If there's still no clicking sound from the injector, then the injector will need replacing.