Engine Ignition System - Ignition (H4SO): Adjustments Subaru Forester SH

ADJUSTMENT

Clean spark plugs with a nylon brush, etc. Clean and remove the carbon or oxide deposits. If deposits are too stubborn, replace the spark plugs. After cleaning the spark plugs, measure the spark plug gap using a gap gauge.

Note. Never use plug cleaner. Do not use metal brush or it will wear insulator.

Spark plug gap L

1.0 - 1.1 mm (0.039 - 0.043 in)

Scheme 7

Scheme 8

1. Disconnect the ground cable from the battery.
2. Disconnect the spark plug cords from ignition coil and ignitor assembly.
3. Disconnect the connector (A) from the ignition coil and ignitor assembly.
4. Remove the bolt (B) which secures the ignition coil and ignitor assembly to the intake manifold.

Scheme 9