Mazda RX-8 Workshop Manual page 728

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2011 - RX-8 - Engine
NO.10 LOW IDLE/STALLS DURING DECELERATION [13B-MSP]
10 LOW IDLE/STALLS DURING DECELERATION
DESCRIPTION
The engine stops unexpectedly at the beginning of deceleration or
recovery from deceleration.
Vacuum leakage
Air leakage from intake-air system
Air suction at intake-air system (between MAF sensor and intake part)
Improper operation of drive-by-wire control system (abnormal accelerator
position and TP signals to PCM)
Drive-by-wire control system operates in fail-safe mode (abnormal
accelerator position and TP signal to PCM)
Throttle body malfunction (restriction, stuck closed)
Evaporative emission control system malfunction
Improper operation of fuel cut control
Fuel injector improper operation
Fuel injector malfunction (leakage, clogging, improper injection amount)
Inadequate fuel pressure
Pressure regulator (integrated in fuel pump unit)
Fuel pump mechanical malfunction
Fuel line restriction or clogging
MAF sensor improper installation
MAF sensor or related circuit malfunction (abnormal signal to PCM)
Brake switch or related circuit malfunction (abnormal signal to PCM)