Mazda RX-8 Workshop Manual page 720

15 Inspect the spark plug
conditions.
(See SPARK PLUG INSPECTION
[13B-MSP].)
Is the spark plug wet, covered
with carbon or grayish white?
16 Perform the Secondary Shutter
Valve (SSV) Operation Inspection.
(See ENGINE CONTROL SYSTEM
OPERATION INSPECTION [13B-
MSP].)
Does the SSV operate properly?
17 Perform the Auxiliary Port Valve
(APV) Control Inspection.
(See ENGINE CONTROL SYSTEM
OPERATION INSPECTION [13B-
MSP].)
Does the APV control operate
properly?
18 Disconnect the fuel line quick
release connector and install the
fuel gauge to the fuel line.
Start the engine and run it at
idle.
Measure the fuel line pressure at
idle.
Is the fuel line pressure correct
at idle?
(See FUEL LINE PRESSURE
INSPECTION [13B-MSP].)
Open circuit between ignition switch and
ignition coil
Open circuit between ignition coils
terminal A and PCM terminal 2AT, 2AX,
2AW or 2BA
Spark plug is wet or covered with carbon:
Yes
Inspect for fuel leakage from fuel injector.
Spark plug is grayish white:
Inspect for clogging fuel injector (FP) (RP).
No Install spark plugs in the original positions.
Go to the next step.
Yes Go to the next step.
No Repair or replace the malfunctioning part according to the
inspection results.
Yes Go to the next step.
No Repair or replace the malfunctioning part according to the
inspection results.
Yes Go to the next step.
No Zero or low:
Inspect for clogged fuel line.
High:
If normal, replace the
fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION
[13B-MSP].)