No.5 Engine Stalls-After Start/At Idle: Notes

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

NO.5 DESCRIPTION AND POSSIBLE CAUSE

5	ENGINE STALLS-AFTER START/AT IDLE
DESCRIPTION	Engine stops unexpectedly.
POSSIBLE CAUSE	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 (FP1) (RP1) 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) MAF sensor improper installation No signal from eccentric shaft position sensor due to sensor, related wire or wrong installation Electrical connector disconnected 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 A/C system operation is improper Engine overheating Abnormal engine oil condition (viscosity, amount, deterioration) Spark leakage from high-tension leads Ignition coil malfunction Immobilizer system and/or circuit malfunction Immobilizer system operates properly (Key is not registered.) WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this article. (See BEFORE REPAIR PROCEDURE .) (See AFTER REPAIR PROCEDURE .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

ENGINE STALLS-AFTER START/AT IDLE

DESCRIPTION

Engine stops unexpectedly.

POSSIBLE CAUSE

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 (FP1) (RP1) 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)
MAF sensor improper installation
No signal from eccentric shaft position sensor due to sensor, related wire or wrong installation
Electrical connector disconnected
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
A/C system operation is improper
Engine overheating
Abnormal engine oil condition (viscosity, amount, deterioration)
Spark leakage from high-tension leads
Ignition coil malfunction
Immobilizer system and/or circuit malfunction
Immobilizer system operates properly (Key is not registered.)
WARNING:
The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system:
- 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 REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this article.
  (See BEFORE REPAIR PROCEDURE .)
  
  (See AFTER REPAIR PROCEDURE .)
CAUTION:
- Disconnecting/connecting quick release connector without cleaning it may possibly cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.