My 1990 c1500 5.7 TBI wont start in the morning but if i squirt a little bit of gas in the bowls it starts right up but once started it runs fine and it never dies i can hear the fuel pump come on and onces its runing I can see a little fuel comen from the injectors i'm not sure how to check fule pressure or anything the fuel pressure regulator is new I'm leaning towards the injectors but i'm really not sure if you guys could please help me with what you guys think is wrong with it i would greatly appreciate it thanks