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Home >> Mercury >> 1986 >> Sable LS, 4D Sedan >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - 4-CYL >> Testing >> Fuel Pump

Fuel Pump

Make all tests with engine at normal operating temperature, engine at idle speed and transmission in Neutral. When making pressure test, pinch off pump-to-tank fuel return line.

FUEL PUMP PERFORMANCE

Application Specification
Pressure
1.9L 2-Bbl. 4.5-6.5 psi (.32-.46 kg/cm2 )
2.3L 1-Bbl. 5.0-7.0 psi (.35-.49 kg/cm2 )
CFI HSC (Incl. H.O.) 13-16 psi. (.9-1.1 kg/cm2 )
MPFI 35-45 psi (2.5-3.2 kg/cm2 )
Volume
Carbureted & CFI 1 pints (.5L) in 20 seconds
MPFI 1.5 pints (.72L) in 30 seconds