1. Remove the battery cover.
2. Disconnect the negative battery cable. (See
BATTERY REMOVAL/INSTALLATION [LF]
.)
3. Remove the plug hole plate. (See
PLUG HOLE PLATE REMOVAL/INSTALLATION [LF]
.)
4. Remove the front suspension tower bar (joint). (See
FRONT SUSPENSION TOWER BAR
REMOVAL/INSTALLATION
.)
5. Remove the ignition coils. (See
IGNITION COIL REMOVAL/INSTALLATION [LF]
.)
6. Remove the spark plugs using a plug-wrench.
7. Install in the reverse order of removal.
Tightening torque
10-14 N.m {1.1-1.4 kgf.m. 8-10 ft.lbf}
SPARK PLUG INSPECTION [LF]
SPECIFICATION
Spark plug type
L3G2 18 110, L3Y1 18 110
PLUG GAP INSPECTION
1. Measure the spark plug gap using a wire type plug gap gauge.
If it exceeds the specification, replace the spark plug.
Spark plug gap
1.25-1.35 mm {0.050-0.053 in}
CLEANING
CAUTION:
If a spark plug that is not as specified is installed, engine
performance will be deteriorated. Install only the specified spark plug
when replacing.
CAUTION:
To avoid possible damage to the tip, do not adjust the plug gap.
To prevent damaging the tip, use a wire type plug gap gauge when
inspecting the plug gap.
CAUTION:
Carbon may adhere to the tip of the spark plug during vehicle
delivery or repeated short distance driving during the winter time. If
2007 Mazda MX-5 Miata Sport
2007 ENGINE Ignition System - MX-5 Miata
Microsoft
Thursday, July 09, 2009 2:39:35 PM
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© 2005 Mitchell Repair Information Company, LLC.