Here’s a quick follow-up.
It probably isn’t bad fuel.
I have come to the conclusion that once the engine is hot she stops running. I’ve had a few suggestions, bad coil was a good one from ini88.
[ini88] I had something similar with mine after working on it. I hard spark*, fuel, air, etc. Everything was set to go. Then a swapped coil with my Defender because I suspected the coil was weak. yup, that was it. You can have spark, but if its yellow or orange its too weak. You need that white, blue spark to set it running. Maybe check your spark again?
Complete thread here.
Indeed ini88, I will be sourcing a new coil and possibly look at swapping some sensors. I found a derelict 1994 Range Rover in the local breakers yard. I pulled a bunch of stuff off of her. More on that in a later blog post.