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Spark plug change and ignition coil pack change question.

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Standard spark plugs are NGK FR5AP-11 Platinum. Spark plug gap is set between 1.0 - 1.1 mm (0.039 - 0.043 in).


Should you change the spark plug wires? Sometimes, it's better to change just one thing at a time so if there are problems they are easier to diagnose. You can change the spark plug wires later on if you want. It's not a bad idea to change them as preventative maintenance, but not strictly necessary unless they are bad. if you have a multi-meter you can test them.


If you change the spark plug wires, either the Subaru OEM or the NGK blue ones seem to work best.

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