Low Idle/Stalls During Deceleration - Mazda RX-8 Manual

NO.10 LOW IDLE/STALLS DURING DECELERATION
10

LOW IDLE/STALLS DURING DECELERATION

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DESCRIPTION
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POSSIBLE
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CAUSE
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WARNING:
repair procedures. Read the following warnings before servicing the fuel system:
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)
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
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Leakage or clogging in oil nozzle
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Improper A/C magnetic clutch malfunction
Misfire
Improper operation of torque converter clutch control (AT)
Loose installation of engine mounts
The following troubleshooting flow chart contains fuel system diagnosis and
(w) RX8-Engine Troubleshooting
Page 70