"I have a 91 Silverado 5.7 EFI that wouldn't start , cranked but wasn't squirting gas into TB. This was intermittent at first. Is there any part of the fuel system that would keep the injectors from firing intermittently. I have 15 psi on the fuel line and I just rebuilt the press regulator. If I keep trying it will eventually start but I tested it and it's definitely not squirting fuel when it won't start. Now it's more frequent and sometimes dies when put into gear( not a trans issue I'm pretty sure). I've replaced the coolant sensor and the ign module , also as I said rebuilt the press regulator. Can't figure why when it dies , it won't start back up because no fuel squirting from injectors . Then it will . Any help appreciated ! I am a mech and I'm trying to not throw parts at it!"
15 lbs fuel pressure might be too much. It should be 9 to 13, so not that far off. I know when an injector gets too much fuel pressure it will not work. Another thing to check is if your are getting an injection pulse to the connectors. Finally, you may have plugged or faulty injectors.
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