Mazda RX-8 Workshop Manual page 685

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2011 - RX-8 - Engine
NO.5 ENGINE STALLS-AFTER START/AT IDLE [13B-MSP]
5 ENGINE STALLS—AFTER START/AT IDLE
DESCRIPTION Engine stops unexpectedly.
No battery power supply to PCM or poor GND
Vacuum leakage
Air leakage from intake-air system parts
Air suction at intake-air system (between MAF sensor and intake ports)
Air cleaner restriction
Improper operation of drive-by-wire control system
Throttle body malfunction (stuck closed)
Poor fuel pressure
Inadequate fuel pressure
Pressure regulator malfunction (integrated in fuel pump unit)
Fuel pump body mechanical malfunction
Fuel pump resister malfunction (open)
Fuel leakage from fuel injector
Fuel injector (FP) (RP) clogging
Jet air mixing system malfunction (restriction or leakage at air passage)
Open or short circuit in fuel pump body and related wiring harness
Restriction in exhaust system
Purge solenoid valve malfunction (stuck open)
Improper air/fuel ratio control (abnormal signal from ECT sensor to PCM)