5000S Sedan L5-2226cc 2.22L SOHC (KZ) (1985)
Fuel Pressure: Testing and Inspection
Differential Pressure Test
DIFFERENTIAL PRESSURE I, CHECKING
WORK SEQUENCE
-
close valve on VW 1318 pressure gauge
-
turn ON us 4480/3
-
differential pressure regulator electrical plug still disconnected
-
differential pressure must be 0.2 to 0.5 bar (2.9 to 7.0 psi) less than system pressure
If pressure NOT OK
-
disconnect fuel distributor lower chamber return line from diaphragm pressure regulator and hold over measuring container
-
plug the open connection to diaphragm pressure regulator
-
turn ON us 4480/3 for one minute
-
fuel flow quantity must be 130 to 150 cm3/minute
If fuel quantity OK
-
replace differential pressure regulator
If fuel quantity NOT OK
-
replace fuel distributor
DIFFERENTIAL PRESSURE II, CHECKING
-
close valve on VW 1318 pressure gauge
-
connect harness adapter VW 131 5A/1 between differential pressure regulator and open harness connector
-
connect multimeter us 1119 to harness adapter VW 1315A/1. Set scale to DCA 200 mA
-
remove connector from engine coolant temperature sensor (arrow)
-
connect 15 kohms side of tool VW 1490 to open temperature sensor harness connector
-
turn ignition ON
-
turn ON US 4480/3
-
differential pressure must be 0.7 to 1.2 bar (10 to 17.5 psi) less than system pressure
-
differential pressure regulator current must be 50 to 80 mA