FixVault

Fuel Pump: 4.2L

Perform fuel pump test with air cleaner removed and fuel inlet line or filter disconnected at carburetor. Disconnect fuel return line at fuel filter and plug nipple on filter. Make all tests at idle speed. See FUEL PUMP SPECIFICATIONS TABLE  TABLE.

FUEL PUMP SPECIFICATIONS

Application Pressure psi (kg/cm2 ) Volume (1) Pts. (L)
4.0L (2) 31 (2.1) 1.0 (.47)
4.0L (3) 39 (2.6) 1.0 (.47)
4.2L 4.0-5.0 (.28-.35) 1.0 (.47)
(1) Volume per 30 seconds.
(2) With the vacuum hose connected to the pressure regulator.
(3) With the vacuum hose removed from the pressure regulator.