Ignition Coil
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2000 Jaguar XK8, 2000 Jaguar XJR, 2000 Jaguar XJ8, 2000 Jaguar S-Type, and 1999 Jaguar XK8. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition off. Disconnect appropriate ignition coil harness connector. Measure resistance between ignition coil terminals. On S-Type, resistance should be.5-1.0 ohm. On XJR, XJ8 and XK8, resistance should be.54-1.04 ohms. On all models, replace ignition coil if resistance is not as specified.