Of course...... even the test with the old filter in place showed fuel flow well above what is required for your power level(90GPH/540PPH)........ so I wonder if the wiring couldn’t keep up with the draw.
I don’t know what pump you’re running, but the higher PPH Walbros mention they have high current draw at high pressure/high flow....... so the wiring needs to be up to the task.
Do you have the regulator before or after the fuel rail?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
