1999 Disco1 stalling issue

[omniplayer]

After driving my rover for over an hour it sometimes just shuts off and stinks like carbon. To start it back up you have to keep cranking it and hitting the gas pedal and then it starts up. I don't think its fuel related but could it have anything to do with the cat or exhaust system erg value ext?

 

[Disco Mike]

How many miles on it, what are the fault code numbers and have you ever replaced the crank position sensor?