The fuel supply system consists of a fuel tank, in-tank
high pressure fuel pump, fuel pump relay, fuel pump
resistor, PGM-FI main relay, fuel filter, fuel pressure
regulator, fuel injectors and fuel injector resistor.
This system delivers pressure-regulated fuel to the fuel
injectors and cuts the fuel delivery when the engine is
Do not smoke while working on the fuel system.
Keep open flames or sparks away from your work
Be sure to relieve fuel pressure while the engine is
NOTE: Before disconnecting fuel pipes or hoses,
release pressure from the system by loosening the 6
mm service bolt at top of the fuel filter.
1. Disconnect the battery negative cable from the battery
2. Remove fuel fill cap.
3. Use a box end wrench on the 6 mm service bolt at
the fuel filter, while holding the special banjo bolt
with another wrench.
4. Place a rag or shop towel over the 6 mm service bolt.
5. Slowly loosen the 6 mm service bolt one complete
12 N.m (1.2 kg-m, 9lb-ft)
A fuel pressure gauge can be attached at the 6 mm
service bolt hole.
Always replace the washer between the service bolt
and the special banjo bolt, whenever the service
bolt is loosened to relieve fuel pressure.
Replace all washers whenever the bolts are
removed to disassemble parts.
Fuel Supply System
Fuel Pressure (cont’d)
1. Relieve fuel pressure (see page 11-105).
2. Remove the service bolt on the fuel filter while
holding the banjo bolt with another wrench and at-
tach the fuel pressure gauge.
3. Start the engine. * Measure the fuel pressure with
the engine idling and vacuum hose of the fuel
pressure regulator disconnected from the fuel
pressure regulator and pinched.
4. Reconnect vacuum hose to the fuel pressure
FUEL PRESSURE GAUGE
: If the engine will not start, turn the ignition
switch on, wait for two seconds, turn it off,
then back on again and read the fuel pressure.
If the fuel pressure is not as specified, first check the
fuel pump (see page 11-116, 119). If the fuel pump
is OK, check the following:
If the fuel pressure is higher than specified, inspect
Pinched or clogged fuel return hose or piping.
Faulty fuel pressure regulator (see page
If the fuel pressure is lower than specified, inspect
Clogged fuel filter.
Faulty fuel pressure regulator failure (see page
Leakage in the fuel line.