Mazda 6 2002, Workshop Manual

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F–218
TROUBLESHOOTING
End Of Sie
NO.20 FUEL ODOR (IN ENGINE COMPARTMENT)
A6E398018881W22
Diagnostic procedure
6 Install fuel pressure gauge between fuel pipe
and fuel distributor.
Start engine and run it at idle.
Measure fuel line pressure at idle.
Is fuel line pressure correct at idle?
(See
F–20 FUEL LINE PRESSURE
INSPECTION )
Yes Go to next step.
No Zero or low:
•
Inspect for clogged fuel line.
•
If okay, replace fuel pump unit.
High:
•
Replace fuel pump unit.
7 Is strong blue spark visible at each disconnected
high-tension lead while cranking engine? Yes Inspect spark plugs and CMP sensor.
No Inspect following:
•
High-tension leads
•
Ignition coil and connector
8 Verify test results.
•
If okay, return to diagnostic index to service any additional symptoms.
•
If malfunction remains, replace PCM.
STEP INSPECTION RESULTS ACTION
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 fuel system diagnosis and repair
procedures. Read following warnings before performing 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 REPAIR PROCEDURE” and “AFTER REPAIR PROCEDURE” described in this
manual.
(See
F–17 BEFORE REPAIR PROCEDURE .)
(See F–17 AFTER REPAIR PROCEDURE .)
Caution
•
Disconnecting/connecting quick release connector without cleaning it may possibly cause
damage to fuel pipe and quick release connector. Always clean quick release connector
joint area before disconnecting/connecting, and make sure that it is free of foreign material.
STEP INSPECTION RESULTS ACTION
1 Visually inspect for fuel leakage at fuel injector
O-ring and fuel line.
Service as necessary.
Install fuel pressure gauge between fuel pipe
and fuel distributor.
Start engine and run it at idle.
Measure fuel line pressure at idle.
Is fuel line pressure correct at idle?
(See
F–20 FUEL LINE PRESSURE
INSPECTION )
Yes Go to next step.
No Replace fuel pump unit.
2 Inspect for blockage/restriction or open between
engine vacuum port and charcoal canister.
Inspect for blockage in fuel tank vent system.
Is fault indicated? Yes Replace vacuum hose.
No Go to next step.
3 Inspect purge solenoid valve.
(See
F–39 PURGE SOLENOID VALVE
INSPECTION .)
Is solenoid operating properly?
Yes Go to next step.
No Replace purge solenoid valve.