5 Engine Stalls-After Start/At Idle [Z6] - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Inspect engine condition while tapping
the EGR valve housing.
14
Does the engine condition improve?
Inspect the starting system.
15 (See STARTER INSPECTION.)
Is the starting system normal?
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
(See ENGINE SYMPTOM TROUBLESHOOTING
• If malfunction remains, inspect related Service information perform repair or diagnosis.
16
- If vehicle repaired, troubleshooting completed.
- If vehicle not repaired or additional diagnostic information not available, replace the
PCM.
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION
NO.5 ENGINE STALLS-AFTER START/AT IDLE [Z6]
5
DESCRIPTION • The engine stops unexpectedly.
• Improper A/C system operation
• Air leakage from intake-air system parts
• Purge solenoid valve malfunction
• Improper IAC valve operation
• EGR valve malfunction
• No signal from the CKP sensor due to sensor, related wire or wrong installation
POSSIBLE
• Vacuum leakage
CAUSE
• Engine overheating
• Low engine compression
• Erratic signal to ignition coil
• Poor fuel quality
• PCV valve malfunction
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ENGINE STALLS-AFTER START/AT IDLE
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Replace EGR valve.
Go to the next step.
Inspect for loose connectors or poor terminal
contact.
• If normal, remove the EGR valve and
visually inspect for mechanically stuck EGR
valve.
Repair or replace the components as
required.
[Z6].)
[Z6].)
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