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What PSI is required for a 1989 Chevrolet 305 TBI fuel pump?

There's no single PSI figure for a 1989 Chevrolet 305 TBI fuel pump. The pressure is regulated, not set solely by the pump's output. The fuel pressure regulator maintains the correct pressure at the fuel rail, typically between 9 and 12 PSI. The pump itself produces higher pressure, but the regulator lowers it to the proper operating range.

You should consult your vehicle's repair manual or a reliable online resource specific to the 1989 Chevrolet 305 TBI system to find the exact specifications for your model. Trying to operate outside of the recommended pressure range can damage your fuel injectors or other components.

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