Mazda RX8 - Page 50

Disconnect the fuel line quick release
connector and install the fuel gauge to
the fuel line.
Short check connector terminal F/P to
the body GND using a jumper wire.
Turn the ignition switch to the ON
position.
Is the fuel line pressure correct when
ignition switch is turned on/off five
times ?
(See FUEL LINE PRESSURE
INSPECTION .)
No
Zero or low:
Inspect the fuel pump relay and the
fuel pump circuit.
Inspect for clogged fuel line.
If normal, replace the fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION .)
High:
Replace the fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION .)
Yes Go to the next step.
22
Visually inspect for fuel leakage at the
fuel injector, O-ring and fuel line.
Service if necessary.
Is the fuel line pressure held after the
ignition switch is turned off?
(See FUEL LINE PRESSURE
INSPECTION .)
No
Inspect the fuel injector.
(See FUEL INJECTOR INSPECTION
.)
If the fuel injector is normal, replace
the fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION .)
Yes
Inspect if the purge solenoid valve
sticks open mechanically.
Inspect the evaporative emission
control system.
23
Disconnect the vacuum hose between
the purge solenoid valve and the intake
manifold at the quick release
connector.
Plug the opening end of vacuum hose.
Attempt to start the engine.
Is the starting condition improved?
No Go to the next step.
Yes Go to the next step.
24
Perform the fuel injector operation
inspection.
(See Fuel Injector Operation Inspection
.)
Does the fuel injector operate properly?
No
Repair or replace the malfunctioning
parts, according to the fuel injector
operation inspection results.
25 Yes Go to the next step.
(w) RX8-Engine Troubleshooting
Page 50