Jaguar XJR rough idle issue resolved by replacing IC on Jaguar XJR

Some Jaguar XJR owners report experiencing rough idle issues, which can often be improved by replacing the ignition coil. This component is vital to the vehicle's ignition system and significantly affects engine performance and idle quality. Additionally, owners have noted that other potential causes of rough idle may include vacuum leaks and spark plug problems. It is crucial for owners to consider these factors when diagnosing and resolving rough idle symptoms in their Jaguar XJR.