Still having problems with my 1983 4/4 it has a cvh engine, and to date I have cleaned out the fuel filter, cleaned the breather pipes, and felt the vacuum pipes (they compress and seem to be supple, I have replaced the distributer cap, rotor arm, ignition amplifier, coil (these are Intermotor brand) and checked the leads also the plugs are a nice light brown colour and the car runs OK for about 18 miles then it looses power, and starts to chug I have to rev it at traffic light sand when I got home it cut out and wold not start for about 10 minutes. I would be grateful for any suggestions, does anybody know of a garage in Liverpool who could help?, I would go to Lifes only they are very busy.
Might seem a daft idea but the distance you quote and things changed made the grey matter stir.....have you tried driving with the fuel cap off to see if it makes a difference? You would not be the first to have a fuel vent blockage!