No.6 Cranks Normally But Will Not Start: 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.6 DESCRIPTION AND POSSIBLE CAUSE

6	CRANKS NORMALLY BUT WILL NOT START
DESCRIPTION	The starter cranks the engine at normal speed but the engine will not run. Refer to the symptom troubleshooting " NO.5 ENGINE STALLS-AFTER START/AT IDLE DIAGNOSTIC PROCEDURE " if this symptom appears after engine stall. The fuel is in the tank. The battery is in normal condition.
POSSIBLE CAUSE	No battery power supply to PCM Open PCM GND or vehicle body GND Air cleaner restriction Air leakage from intake-air system Vacuum leakage Improper operation of drive-by-wire control system Drive-by-wire control system operates in fail-safe mode (abnormal accelerator position and TP signal to PCM) Poor fuel quality Open or short circuit in fuel pump body and related wiring harness Inadequate fuel pressure Fuel pump relay malfunction (stuck open) Fuel pump mechanical malfunction Pressure regulator (integrated in fuel pump unit) malfunction Fuel injector malfunction (leakage, clogging, improper injection amount) Open or short in fuel injector control signal circuit Purge solenoid valve malfunction (stuck open) Restriction in exhaust system Disconnected electrical connector No signal from eccentric shaft position sensor, related wiring harness or incorrect installation Improper air/fuel ratio control at starting (abnormal ECT signal to PCM) APP sensor malfunction (de-chock control operating due to abnormal accelerator position 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 Engine overheating Spark leakage from high-tension leads Spark plug malfunction 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.

CRANKS NORMALLY BUT WILL NOT START

DESCRIPTION

The starter cranks the engine at normal speed but the engine will not run.
Refer to the symptom troubleshooting " NO.5 ENGINE STALLS-AFTER START/AT IDLE DIAGNOSTIC PROCEDURE " if this symptom appears after engine stall.
The fuel is in the tank.
The battery is in normal condition.

POSSIBLE CAUSE

No battery power supply to PCM
Open PCM GND or vehicle body GND
Air cleaner restriction
Air leakage from intake-air system
Vacuum leakage
Improper operation of drive-by-wire control system
Drive-by-wire control system operates in fail-safe mode (abnormal accelerator position and TP signal to PCM)
Poor fuel quality
Open or short circuit in fuel pump body and related wiring harness
Inadequate fuel pressure
Fuel pump relay malfunction (stuck open)
Fuel pump mechanical malfunction
Pressure regulator (integrated in fuel pump unit) malfunction
Fuel injector malfunction (leakage, clogging, improper injection amount)
Open or short in fuel injector control signal circuit
Purge solenoid valve malfunction (stuck open)
Restriction in exhaust system
Disconnected electrical connector
No signal from eccentric shaft position sensor, related wiring harness or incorrect installation
Improper air/fuel ratio control at starting (abnormal ECT signal to PCM)
APP sensor malfunction (de-chock control operating due to abnormal accelerator position 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
Engine overheating
Spark leakage from high-tension leads
Spark plug malfunction
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.