Mazda RX-8 Workshop Manual page 699

POSSIBLE
CAUSE
WARNING:
The following troubleshooting flow chart contains fuel system diagnosis and repair
procedures. Read the following warnings before servicing the fuel system:
Purge solenoid valve malfunction (stuck open)
Restriction in exhaust system
Disconnected electrical connector
No signal from eccentric shaft position sensor, related wiring harness or
incorrect installation
Improper air/fuel ratio control at starting (abnormal ECT signal to PCM)
APP sensor malfunction (de-chock control operating due to abnormal
accelerator position signal to PCM)
Low engine compression
Engine internal malfunction
Abnormal engine oil condition (viscosity, deterioration)
Low oil pressure
Excessive fuel pressure
Air mixed in oil line
Metering oil pump malfunction
Engine overheating
Spark leakage from high-tension leads
Spark plug malfunction
Ignition coil malfunction
Immobilizer system and/or circuit malfunction
Immobilizer system operates properly (Key is not registered)
Fuel vapor is hazardous. It can easily ignite, causing serious injury and
damage. Always keep sparks and flames away from fuel.
Fuel line spills and leakage are dangerous. Fuel can ignite and cause
serious injuries or death and damage. Fuel can also irritate skin and eyes.
To prevent this, always complete "BEFORE SERVICE PRECAUTION" and
"AFTER SERVICE PRECAUTION" described in this manual. (See
SERVICE PRECAUTION
[13B-MSP].)
Leakage or clogging in oil pipe
Leakage or clogging in oil nozzle
[13B-MSP].) (See AFTER SERVICE PRECAUTION
BEFORE