I can remember when these valves were first introduced back in the late 70's, early 80's. There was rubbish petrol around then with lots of problems of excessive pinking and the engine running on after you had switched it off (also known as dieselling). These valves were fitted to carbs in order to cut the fuel supply within the carb, on the idle circuit I seem to remember, in order to combat the running on issues.
These days we have better quality fuel so the valves are pretty much redundant.
When I had trouble starting my 750L a few months back I suspected the valve may be the cause, so I took it out and snipped off the plunger bit with some wire cutters, so in effect the valve is now always open. It wasn't the cause of my starting problem but I just wanted to explain that you can do this and it will not effect the running of the car, and give you one less part to worry about.
These days we have better quality fuel so the valves are pretty much redundant.
When I had trouble starting my 750L a few months back I suspected the valve may be the cause, so I took it out and snipped off the plunger bit with some wire cutters, so in effect the valve is now always open. It wasn't the cause of my starting problem but I just wanted to explain that you can do this and it will not effect the running of the car, and give you one less part to worry about.
