Mazda 3 - 5 Engine Stalls-After Start;At Idle [Lf]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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554
Inspect engine condition while
tapping the EGR valve housing.
Does engine condition improve?
No
Go to the next step.
15
Inspect the starting system.
(See STARTER INSPECTION.)
Is starting system normal?
Yes
Inspect for loose connectors or poor terminal
contact.
• If there is no malfunction, remove EGR valve
and visually inspect for mechanically stuck
EGR valve
No
Repair or replace components as required.
16
Verify test results.
• If normal, return to diagnostic index to service any additional symptoms.
(See ENGINE SYMPTOM TROUBLESHOOTING [LF].)
• 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 PCM REMOVAL/INSTALLATION [LF].)
NO.5 ENGINE STALLS-AFTER START/AT IDLE [LF]
B3E010318881W07
5
ENGINE STALLS-AFTER START/AT IDLE
DESCRIPTION
• The engine stops unexpectedly.
POSSIBLE
CAUSE
• A/C system operation is improper
• Air leakage from intake-air system parts
• Purge valve malfunction
• Improper operation of IAC valve
• EGR valve malfunction
• No signal from CKP sensor due to sensor, related wire or wrong installation
• Vacuum leakage
• Engine overheating
• Low engine compression
• Erratic signal to ignition coil
• Poor fuel quality
• PCV valve malfunction
• Air cleaner restriction