I have had the cat overheating occurred twice and have changed out the water temp sensor twice and resolved the issue, this time that does not seem to work. I am considering replacing the Marelli ignition system while doing a few other upgrades. Has anyone done this? If so how and does it work well? Any input would be helpful, and I have read the Kirby book on this area, but would like to see if newer options are available at this time.
1991 XJS Convertible Classic 5.3
