What kind of ignition system does the XJ-S have?
XJS IGNITION SYSTEM TYPES and HE REPLACEMENT COILS There have been three distinct types of ignition system fitted to the XJ-S. Up to 1982, the car was fitted with the same Lucas Opus system that was used in the Series III E-Type.
How do you troubleshoot a Lucas ignition system?
1. Pull the lead from coil to distributor out of the distributor and jam it under a fuel pipe so there’s a gap of about 1 mm (.04in) between the brass and the nearest engine part. 2. Crank the engine. Do you get fat, blue sparks in the gap? Then the ignition is OK and you need to troubleshoot the injection system. If not, continue: 3.
How many cylinders does a Jaguar V12 have?
The Jaguar V12 H.E. has 12 cylinders, turns at 6500 RPM, and has 11.5:1 compression, making it one of the biggest challenges for an ignition system in production automobiles. To cope with this, Jaguar has incorporated some sophisticated ignition technology.
What causes the timing to change on a Jaguar V12?
The Jaguar V12 design eliminates most wear items that would normally cause ignition timing to vary, such as ignition points or sloppy camshaft drive systems. The only remaining reason for the timing to change would be wear in the timing chain itself, and the Jaguar timing chain normally wears so slowly as to be insignificant.
What kind of ignition system does Jaguar XJ-S use?
Three ingition systems have been used on the Jaguar XJ-S: the Lucas Opus Mark 2 system on non-H.E. engines prior to 1982; the Lucas ignition on H.E. engines 1982 to 1989; and finally the Marelli ignition on post-1989 cars. An ignition coil requires a certain amount of time to build up enough energy to produce a spark.
How to check ignition timing on Lucas V12?
When checking the ignition timing on the V12, the vacuum line to the distributor vacuum advance must be disconnected and plugged.
The Jaguar V12 design eliminates most wear items that would normally cause ignition timing to vary, such as ignition points or sloppy camshaft drive systems. The only remaining reason for the timing to change would be wear in the timing chain itself, and the Jaguar timing chain normally wears so slowly as to be insignificant.
The Jaguar V12 H.E. has 12 cylinders, turns at 6500 RPM, and has 11.5:1 compression, making it one of the biggest challenges for an ignition system in production automobiles. To cope with this, Jaguar has incorporated some sophisticated ignition technology.