12 - 14 LBS for 87-95 TBI, 60+ LBS for 96+ Vortec. You need to get your pressure back to ~13 PSI. Maybe the injectors are jammed now with that much pressure? I've run them at 28 PSI but never that high!
Voltage was probably raising and lowering due to starter draw. Use a noid light to ensure they're getting pulses.the injectors are pulsing, I probed them with a multimeter and while in the run position they were getting power and while cranking they would raise and lower
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