DIAGNOSTIC PROCEDURE
SPARK PLUG CONDITION DIAGNOSTIC PROCEDURE TABLE
POSSIBLE CAUSE
Spark-Spark weak
Air/fuel mixture-Too rich
Compression-Low compression
Clogging in intake/exhaust system
Grayish white with all plugs:
Air/fuel mixture-Too lean
WARNING:
The following DIAGNOSTIC PROCEDURE TABLE
contains the fuel system diagnosis and repair
procedures. Read the following warnings before
servicing the fuel system:
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 SERVICE
PRECAUTION" and "AFTER SERVICE
PRECAUTION" described in this article.
(See BEFORE SERVICE PRECAUTION
[LF] .)
(See AFTER SERVICE PRECAUTION [LF] .)
CAUTION:
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.
Yes
Troubleshooting completed.
2007 Mazda MX-5 Miata Sport
2007 ENGINE PERFORMANCE Symptom Troubleshooting - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:42:11 PM
Page 114
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