Mazda 3 Workshop Manual page 520

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
Diagnostic procedure
STEP INSPECTION
Remove all the spark plugs.
1 Inspect the spark plug condition.
Is the spark plug condition normal?
Are the spark plugs wet/covered with carbon by
2
engine oil?
Inspect the spark plug for the following:
• Cracked insulator
• Heat range
3
• Air gap
• Worn electrode
Is the spark plug normal?
4
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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 the "BEFORE SERVICE PRECAUTION" and
"AFTER SERVICE PRECAUTION " described in this manual.
(See BEFORE SERVICE
(See AFTER SERVICE PRECAUTION.)
Caution
• If there is foreign material on the connecting area of the quick release
connector, it might damage the connector or fuel pipe. To prevent this,
disconnect the connector and clean the connecting area before connecting.
https://carmanualshub.com/
PRECAUTION.)
RESULTS
Yes Troubleshooting completed.
Specific plug is wet or covered
with carbon:
Go to the next step.
Specific plug looks grayish white:
Go to Step 7.
No
All plugs are wet or covered with
carbon:
Go to Step 10.
All plugs look grayish white:
Go to Step 16.
Inspect all areas related to oil
Yes
working up and down.
No Go to the next step.
Yes Go to the next step.
Replace the spark plug.
No
(See SPARK PLUG
REMOVAL/INSTALLATION
Yes Go to the next step.
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ACTION
[Z6].)