5S-FE MK2 Non-Turbo Engine 72 PSI Fuel pressure... How? [Archive] - Toyota MR2 Message Board

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What could cause fuel pressure, measured at the fuel filter, to be 72 PSI!? (Spec: 38-44 PSI @ Fuel Rail) Firstly, I rented a fuel pressure gauge and did some tests that I don’t feel entirely confident about. I returned the tool and have sent away for my own kit so I can do extensive testing both at the fuel filter and especially at the fuel rail (after the pulsator, in the same atmosphere as the injectors). I have a few days before it gets here, and have a lot of learning to do about fuel