Section 07 ENGINE MANAGEMENT (DI)
Subsection 02 (COMPONENT INSPECTION AND ADJUSTMENT)
If the same injector is reinstalled, carefully inspect
O-ring condition before reinstalling fuel injector.
Replace O-ring with a new one if damaged.
Insert the fuel injector in place with your hand. Do
not use any tool.
NOTE: A thin film of injection oil may be applied
to O-ring to ease insertion in rail.
Apply Loctite 243 on rail retaining screws then
torque to 25 N•m(18lbf•ft).
AIR/FUEL RAIL
Pressure Test
Crank or start engine and observe fuel pressure.
FUEL PRESSURE
(when cranking engine or when
engine is running)
738 ± 14 kPa (107 ± 2 PSI)
If pressure is within limits, fuel and air systems
are working adequately. No subsequent tests are
necessary for the air/fuel system.
Remove pressure gauge and reinstall fuel hose.
At installation apply engine oil on O-ring.
If pressure is out of limits, check air/fuel rail for
leaks. If it is not leaking then replace air pressure
regulator.
A higher pressure may be an indication of a
pinched or clogged air pressure regulator outlet
line.
Air Pressure Regulator Replacement
Removal
See FUEL PRESSURE REGULATOR REMOVAL
above for procedure.
Remove the fuel regulator then the air pressure
regulator.
Installation
For the installation, reverse the removal procedure
but pay attention to the following.
NOTE: A thin film of injection oil may be applied
to O-ring to ease insertion in rail.
Apply Loctite 243 on rail retaining screws then
torque to 25 N•m(18lbf•ft).
Air/Fuel Rail Replacement
Removal
Release the fuel pressure in the system.
Disconnect air compressor supply hose from rail.
Disconnect fuel hoses (supply and return) at their
inline connectors.
Temporarily connect these hose ends together to
prevent rail draining.
Disconnectspark plug cables from spark plugs and
fuel injector wires. Cut locking ties of wiring.
Unscrew rail retaining screws.
314 2
F12R0CA
1. Air/fuel rail
2. Air supply hose
3. Fuel supply hose
4. Retaining screws
smr2004-Complete Line Up 349
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