Mazda 3 - 20 Fuel Odor (in Engine Compartment) [Z6]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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508
Replace fuel pump unit.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION.)
7
Perform the spark test.
(See Spark Test.)
Is strong blue spark visible at each
cylinder?
Yes
Inspect the CMP sensor.
(See CAMSHAFT POSITION (CMP) SENSOR
INSPECTION [Z6].)
No
Repair or replace the malfunctioning part
according to spark test result.
8
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.20 FUEL ODOR (IN ENGINE COMPARTMENT) [Z6]
B3E010318881W53
20
FUEL ODOR (IN ENGINE COMPARTMENT)
DESCRIPTION
Gasoline fuel smell or visible leakage
POSSIBLE
CAUSE
• Excessive fuel pressure
• Purge solenoid valve malfunction
• Fuel tank vent system blockage
• Charcoal canister malfunction
• Fuel leakage from fuel system
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 the "BEFORE SERVICE PRECAUTION" and
"AFTER SERVICE PRECAUTION" described in this manual.
(See BEFORE SERVICE PRECAUTION.)