1968 240 Jag runs perfectly for 30 mins then dies

[Penelope Stopit]

FalconWood said:

The car is back! Took it out for a 40 minute drive and no recurrence of the issue! The garage provided new battery, new dynamo and new control box. After Penelope's advice they renewed all the earths (a very weak one form the Control Box they said) They believe the dynamo was passing 17 volts to the battery at 1700 revs and may have cooked the battery. The new set up is passing between 13 and 14 volts which is better. I renewed the rotor arm to a red one as advised by one of the contributors from the Distributor Doctor and all seems well.

Thank you all for your rapid and accurate responses to my problem. I really appreciate it and feel more confident that the Jag will behave properly now. Thank you!!

That's good news.