fuel pressure issue,leaking pressure on 1997 Chevrolet Astro

Apprentice 7fcc12909ae64520525213c612d1ef7ee84ad402e611d9a259270b15abea875b
Fuel pressure is 60psi when key is turned on,when yiou shut it off the pressure drops off to zero in one minute.I know the injectors could be leaking,but they are inside the intake manifold.Is there anything else that coyuld be doing this?such as fuel pump,regulator? there are no visible exterior leaks.
(2) Answers
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If the injectors leaked that quickly you would get a cloud of black smoke out the tail pipe on start up. As always I agree with Roy! There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate