Mazda 3 - 6 Cranks Normally but will Not Start [Z6]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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461
(See REFRIGERANT PRESSURE
CHECK.)
• Condenser fan operation
22
Disconnect the vacuum hose between
the purge solenoid valve and the intake
manifold from the purge solenoid side.
Plug the opening end of vacuum hose.
Start the engine.
Is the engine stall now eliminated?
Yes
Inspect if the purge solenoid valve is stuck
open mechanically.
Inspect EVAP control system.
(See Purge Control System Inspection.)
No
Go to the next step.
23
Is air leakage felt or heard at the intake-
air system components while racing the
engine to higher speed?
Yes
Repair or replace malfunctioning part.
No
Go to the next step.
24
Inspect engine condition while tapping
the EGR valve housing.
Does the engine condition improve?
Yes
Replace EGR valve.
No
Go to the next step.
25
Inspect variable valve timing control
system operation.
(See Variable Valve Timing Control
System Operation Inspection.)
Does the variable valve timing control
work properly?
Yes
Go to the next step.
No
Repair or replace malfunctioning part.
26
Is the engine compression correct?
(See COMPRESSION INSPECTION
[Z6].)
Yes
Remove EGR valve and visually inspect for
mechanically stuck EGR valve.
• If there is no malfunction, inspect valve
timing.
(See Timing Chain Installation Note.)
No
Inspect for cause.
27
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
(See ENGINE SYMPTOM TROUBLESHOOTING [Z6].)
• If malfunction remains, inspect related Service information perform repair or diagnosis.
- If vehicle repaired, troubleshooting completed.
- If vehicle not repaired or additional diagnostic information not available, replace the
PCM.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [Z6].)
NO.6 CRANKS NORMALLY BUT WILL NOT START
[Z6]
B3E010318881W39