Jaguar XF performance restriction light due to possible #8 cylinder misfire from spark plug or coil failure on Jaguar XF

Some Jaguar XF owners report experiencing a performance restriction light due to a possible #8 cylinder misfire, which may stem from faulty spark plugs or failing coils. This issue can lead to reduced power and overall performance, making it essential to accurately diagnose the problem by inspecting the spark plugs and coils in the #8 cylinder. In some cases, upgrading to premium spark plugs, such as Denso plugs, can help resolve the issue, particularly if the existing plugs are dirty. Owners are advised to conduct a thorough inspection, clear any error codes, and monitor the engine's behavior after addressing potential spark plug or coil failures to pinpoint the exact cause of the misfire and restore the vehicle's performance.