my 1990 ramcharger wont start??

Yes the fuel pump does buzz when i turn key

Okay if it buzzing Basic check up -You need a fuel gauge tester How to do it There's a nipple on your fuel rail that you can hook up your fuel gauge tester When you put key the starting position Your fuel gauge tester should read 50-60 psi If it's below that number? -you might have faulty fuel pump You might have fuel filter clogged Let me know when you done checking this

I did that and it starts up then dies out rite away

You have a fuel pump or injector issue. Can you check for fuel pressure at the fuel rail or at the injectors.

No i cant but everytime i remove.the gas cap alot of air blows out the gas tank im not sure wht its doing that

Not sure where it would be building pressure from. Some build pressure in hot weather but if it started briefly with the carb cleaner then it's not getting gas thought the system.

that's what I'm thinking myself I'm gonna change at the fuel injection and the fuel pump see it to get it started