If plug fouling is a persistent problem a change of _____ may be required

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Multiple Choice

If plug fouling is a persistent problem a change of _____ may be required

Explanation:
When spark plugs become fouled, their ability to ignite the mixture is compromised because the deposits insulating the electrode prevent a strong, reliable spark. If this problem keeps happening, installing new spark plugs of the correct type and heat range is the most effective fix. Cleaned or reused plugs often don’t regain original performance and can fail again, leading to misfires and rough running. Changing oil, air filters, or fuel may influence operating conditions or deposit formation, but they don’t directly restore a fouled spark plug’s ignition capability the way a fresh set does.

When spark plugs become fouled, their ability to ignite the mixture is compromised because the deposits insulating the electrode prevent a strong, reliable spark. If this problem keeps happening, installing new spark plugs of the correct type and heat range is the most effective fix. Cleaned or reused plugs often don’t regain original performance and can fail again, leading to misfires and rough running.

Changing oil, air filters, or fuel may influence operating conditions or deposit formation, but they don’t directly restore a fouled spark plug’s ignition capability the way a fresh set does.

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