96 Firebird starting problem

I have a 1996 Firebird, and I'm having issures with the car starting. At first this happend once in a while and I could pump the gass a few time while cranking the car and it would start. Now its happening more frequently and my father and I can't seem to figure out whats causing it to not start. We change the fuel filter, I think my dad changed the ignition cluch. The car gets fuel, and it gets a spark. On the bad times when my car just sits there and cranks, I have to pump the heack out of my gass in order to start the car. One time it wouldn't start, even with me pumping the gas and I killed my battery. I was wondering if anyone had an idea on what could cause this to happen.

Which engine?

Check for codes?

Will it start with carb cleaner sprayed into the intake?

Was a fuel pressure reading taken?

Spark on ALL cylinders?

I haven't done any code reading or fuel pressure reading. I have no check engine light on eather. The spark plugs are almost new. They might be 2 months old.

O and its a T1 engine

Do you have any recamendations on where I should take it to get the codes read and fuel pressure checked?