Ignition Timing
WARNING: This page is about a different car, the 2001 Jaguar XKR, 2001 Jaguar XK8, 2001 Jaguar XJR, 2001 Jaguar XJ8, and 2001 Jaguar S-Type. However, it is still accessible from the selected car via links, so may be relevant.
Ignition timing is electronically controlled by Engine Control Module (ECM) or Powertrain Control Module (PCM). No adjustment is necessary.