Mazda RX8 - Page 28

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
with the ignition switch ON?
(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.
11
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.
12
Disconnect the vacuum hose
from the purge solenoid valve and
plug the opening end of the
vacuum hose. Attempt to start the
engine.
Is the starting condition
improved?
No Go to the next step.
Yes
Replace the MAF sensor.
(See INTAKE-AIR SYSTEM
REMOVAL/INSTALLATION .)
13
Inspect the MAF sensor for
contamination.
Is there any contamination?
No Go to the next step.
Yes Replace the suspected part.
14
Visually inspect the exhaust
system part.
Is there any deformed exhaust
system part?
No Go to the next step.
15 Inspect the starting system. Yes Go to the next step.
(w) RX8-Engine Troubleshooting
Page 28