Stock Fuel Injectors 95 z28

How can i check my fuel injectors too see if they are leaking my car is starting to get harder to start my pressure is around 37 38 it takes like 7 seconds to start on a cold start. when its warmed up it fires right up is there a step by step quide i can use or anything ive replaced my plug wires spark plugs and opti spark it just seems like its bogged down alot on my low end power i smell fuel when i first start it up through my vents when i turn my heat on but when running for about 3min i dont smell it anymore.

Thanks, Ryan

1995 camaro z28
flowmaster
cold air intake
stock injectors
madz28 Tune

Shoebox has a good write-up on this: http://shbox.com/1/4th_gen_tech2.html#fuel_pressure_testing