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Home >> Mercury >> 1987 >> Sable LS, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - V6 >> Testing >> Fuel Pump

Fuel Pump

On 3.0L models disconnect fuel return line at fuel rail. On 3.8L models, disconnect return line at throttle body. On both models, connect hose to container.

On 3.0L models, connect pressure gauge at diagnostic valve on fuel rail. On 3.8L models, connect pressure gauge at diagnostic fitting on throttle body. On both models, disconnect wiring connector at fuel tank and apply 12 volts to pump with jumper wire.

FUEL PUMP SPECIFICATIONS

Application Specification
3.0L MPFI
Pressure 39 psi (2.7 kg/cm2 )
Volume 1 pint (.5L) in 30 seconds
3.8L CFI
Pressure
Delivery 35-45 psi (2.5-3.2 kg/cm2 )
Working 35 psi (2.5 kg/cm2 )
Volume 1.5 pints (.72L) in 30 seconds