Many moons ago I had a problem with a '91 9000 - after completion of a journey I would turn off the engine. Then, if I tried to restart when the temperature gauge was at the low end of the "normal" zone, it would never start. The problem was confined to a very narrow range of temperature on the gauge, and seemed to happen if the engine was shut down for about 2 hours.
Fortunately, the car was new - yes, it was the DI cassette.
Fortunately, the car was new - yes, it was the DI cassette.