Help....
I have a 1996 V8 Land Rover discovery and it has had a problem for several months now which I have lost the will to try and fix, but I have decided its time for another go. The engine will start and run happily for about 15 -20 minutes at which point it coughs and splutters before eventually stopping. If you then leave it for 20 minutes or so and then restart it it will run for the same sort of time before stopping again. I have replaced all the leads and plugs, the ignition module, the distr cap and arm and the air flow meter (which did have a fault) how ever the problem still persists, anyone got any ideas...??