Mazda RX8 - No.10 Low Idle;Stalls During Deceleration

NO.10 LOW IDLE/STALLS DURING DECELERATION
10 LOW IDLE/STALLS DURING DECELERATION
DESCRIPTION
• The engine stops unexpectedly at the beginning of deceleration or recovery from
deceleration.
POSSIBLE
CAUSE
• 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)
• Neutral/CPP switch or related circuit malfunction (abnormal signal to PCM)
• TR switch or related circuit malfunction (abnormal 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
• Leakage or clogging in oil pipe
• Leakage or clogging in oil nozzle
• Improper A/C magnetic clutch malfunction
• Misfire
• Improper operation of torque converter clutch control (AT)
• Loose installation of engine mounts
WARNING: The following troubleshooting flow chart contains fuel system diagnosis and
repair procedures. Read the following warnings before servicing the fuel system:
(w) RX8-Engine Troubleshooting
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