32 is low, I don't work on many GM but does the car have a vacuum operated fuel pressure regulator up on the rail? If so unplug while running and see if that 32psi goes up. Also see if fuel is coming out that nipple,had one that was leaking though the diaphragm causing rich mixture screwing up the o2 sensor.
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'68 GTO
'69 Corvette
'75 Cadillac Coupe Deville
TOM
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