DIAGNOSTIC PROCEDURE
DIAGNOSTIC PROCEDURE
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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 BEFORE REPAIR PROCEDURE [MZI-3.5] .)
(see AFTER REPAIR PROCEDURE [MZI-3.5] .)
CAUTION:
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Disconnecting/connecting quick release connector without
cleaning it may 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
Remove all the spark plugs.
Inspect spark plug condition.
Is spark plug condition normal?
Yes
Troubleshooting completed.
No
Specific plug is wet or covered with
carbon:
Go to the next step.
Specific plug looks grayish white:
Go to Step 7.
All plugs are wet or covered with
carbon:
Go to Step 9.
All plugs look grayish white:
Go to Step 15.
2
Are the spark plug wet/covered with
carbon by the engine oil?
Yes
Inspect all areas related to oil, working
up and down.
No
Go to the next step.
3
Inspect the spark plug for the
following:
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Cracked insulator
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Heat range
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Air gap
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Worn electrode
Is the spark plug normal?
Yes
Go to the next step.
No
Replace the spark plug.
(see
SPARK PLUG
REMOVAL/INSTALLATION [MZI-
3.5]
)
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:38 AM
Page 90
© 2005 Mitchell Repair Information Company, LLC.