dirty old commy

hi, i have an 1987 vl commodore station wagon which i am having trouble starting at the moment, i have spark and the engine is turning over, originally i was getting fuel and after removing both fuel pumps i found my external pump was not going and i have sinced replaced it, the car runs when you spray engine start through the air filter, i was thinking it could be an air lock in the injectors fuel rail or the injectors are buggered from running dry? is their a way of bleeding out air locks?, also i pulled off a plug from an injector and when i crank the car over with a test light on the plug the light stays on, should it be pulsing?