Have a 93 Chevy sub . Need Help please?

Question

Have a 93 Chevy sub and changed plugs and cleaned injectors and it starts but dies after about 5 sec any help jbsmobiledjyahoocom?

Answer 1

sounds like fuel pump is loosing pressure

Answer 2

Test spark output at spark plug ends while motor starts and see if it cuts out on you. If not, hook up a fuel pressure gauge in between the pump and injectors. Again, check the pressure while starting and running. It should not go below 10 psi for TBI units and 55 psi for PFI. These trucks were usually equipped with TBI and the spec is 12-15 psi while running. Go from there.