No. 6 Cranks Normally But Will Not Start [L5]: Notes

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

6	CRANKS NORMALLY BUT WILL NOT START
DESCRIPTION	The starter cranks the engine at normal speed but the engine will not run. Refer to symptom troubleshooting "NO. 5 ENGINE STALLS " if this symptom appears after engine stall. Fuel is in tank Battery is in normal condition
POSSIBLE CAUSE	No battery power supply to PCM Air leakage from intake air system Open PCM ground or vehicle body ground Improper operation of electronic throttle control system EGR valve malfunction No signal from CKP sensor due to sensor, related wiring harness or incorrect installation No signal from CMP sensor due to sensor, related wiring harness or incorrect installation Low engine compression Engine overheating Vacuum leakage Erratic signal to ignition coil Improper air/fuel mixture ratio control Poor fuel quality Restriction in intake air system Restriction in exhaust system Disconnected electrical connector Open or short circuit in fuel pump body and related wiring harness Inadequate fuel pressure Fuel pump mechanical malfunction Fuel leakage from injector Fuel injector is clogged. Purge solenoid valve malfunction Spark plug malfunction Ignition coil malfunction Improper operation of variable valve timing control system Improper valve timing Immobilizer system and/or circuit malfunction Immobilizer system operating properly. (Ignition is not registered) Pressure regulator malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this Service Information. (See BEFORE SERVICE PRECAUTION [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the quick release connector. Always clean the 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 symptom troubleshooting "NO. 5 ENGINE STALLS " if this symptom appears after engine stall.
Fuel is in tank
Battery is in normal condition

POSSIBLE CAUSE

No battery power supply to PCM
Air leakage from intake air system
Open PCM ground or vehicle body ground
Improper operation of electronic throttle control system
EGR valve malfunction
No signal from CKP sensor due to sensor, related wiring harness or incorrect installation
No signal from CMP sensor due to sensor, related wiring harness or incorrect installation
Low engine compression
Engine overheating
Vacuum leakage
Erratic signal to ignition coil
Improper air/fuel mixture ratio control
Poor fuel quality
Restriction in intake air system
Restriction in exhaust system
Disconnected electrical connector
Open or short circuit in fuel pump body and related wiring harness
Inadequate fuel pressure
Fuel pump mechanical malfunction
Fuel leakage from injector
Fuel injector is clogged.
Purge solenoid valve malfunction
Spark plug malfunction
Ignition coil malfunction
Improper operation of variable valve timing control system
Improper valve timing
Immobilizer system and/or circuit malfunction
Immobilizer system operating properly. (Ignition is not registered)
Pressure regulator malfunction
WARNING:
The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
- 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 SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this Service Information.
  (See BEFORE SERVICE PRECAUTION [L5] .)
  
  (See AFTER SERVICE PRECAUTION [L5] .)
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.