Section 06
ENGINE MANAGEMENT (DI)
Subsection 03
(COMPONENT INSPECTION AND ADJUSTMENT)
SMR2002-030 _06_03A.FM
06-03-13
Install safety lanyard and observe fuel pressure.
Do not crank engine
.
If pressure is within limits, fuel pressure regulator
is working adequately.
A rapid pressure drop indicates leakage either
from the air/fuel rail or from the fuel pump check
valve. Check air/fuel rail for leaks. If it is not leaking
then replace fuel pump.
A slow pressure drop indicates leakage either from
the fuel injector or from the fuel pressure regulator.
Check fuel injector for leaks (see below). If it is not
leaking then replace fuel pressure regulator.
NOTE:
Fuel in air compressor outlet line is an indica-
tion of a leaking fuel pressure regulator diaphragm.
Remove pressure gauge and reinstall fuel hose. At
installation apply engine oil on O-ring.
Fuel Pressure Regulator Replacement
Removal
Release the fuel pressure in the system.
Disconnect spark plug cables from spark plugs.
Disconnect the fuel injector wires, if necessary.
1. Push clip toward injector to release connector
Unscrew rail retaining screws.
1. Retaining screws
Gently pull rail up by hand, working each side slight-
ly at a time.
Pull rail out.
Unscrew retaining plate screws.
FUEL REGULATOR PRESSURE
(when installing safety lanyard)
185 ± 14 kPa (27 ± 2 PSI)
WARNING
Wipe off any fuel spillage in the bilge. Fuel is
flammable and explosive under certain con-
ditions. Always work in a well ventilated area.
1
F12R0DA
F12R19A
1
1
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Summary of Contents for GTI 5558
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