Ignition Timing

Make sure that throttle controlled vacuum switch is correctly set. Connect a timing light and tachometer to engine. With engine idle set to 750-800 RPM, set vernier advance and retard adjustment on distributor to extreme advance position. Loosen distributor clamp bolt and rotate distributor to set timing at 6° ATDC. Tighten distributor clamp bolt and recheck timing.

Fig 1: Ignition Timing Marks

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

Fig 2: Idle Adjustment Screws

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC