After a hose rupturing and antifreeze spilling out, I decided to overhaul the distributor while I wait for the hose replacement. The Centrifugal Advance was seized completely. After reassembling the distributor and installing the new hose, and filling up the coolant system properly, the V12 is revving very low off the start, and I get a v8 sound with gurgling. I'm not sure if my timing is correct, but I marked and noted the way the rotor arm was pointing originally so that when I reinstall the distributor, it was in the exact location.
jaguar, xjs, v12, low, revving, distributor, v8, sound, 1989