Jaguar XJ40 (XJ) 3.2, 3.6 and 4.0 from VIN...500001 to 708757 (1986-94) • XJS 3.6 and 4.0 from VIN...108026 to 226645 (1982-96)
For top engine performance and fuel economy we recommend that the plug wires be replaced every time the plugs are. Caps and rotors arms should be changed as a set. If you do not have electronic ignition installed, the contact set gap should be checked frequently (Limora recommends every 3.000 miles). Slipped contact sets are often mistaken for carburettion problems. Before the carburettor, check the gap.