Mazda RX8 - Page 83

Perform the fuel pump speed
control operation inspection.
(See Fuel Pump Speed Control
Operation Inspection .)
Do the fuel injectors operate
properly?
No
Repair or replace the malfunctioning parts, according
to the fuel pump speed control operation inspection
results.
Yes Go to the next step.
13
Disconnect the fuel line quick
release connector and install the
fuel gauge to the fuel line.
Short the 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 with
the ignition switch in the ON
position?
(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.
14
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 Go to the next step.
15
Perform the fuel injector operation
inspection.
(See Fuel Injector Operation
Inspection .)
Are the fuel injectors operating
properly?
No
Repair or replace the malfunctioning parts, according
to the fuel injector operation inspection results.
16 Yes Go to the next step.
(w) RX8-Engine Troubleshooting
Page 83