Details, we need details! Make, model, year, petrol or diesel, fuel injected or carb, what exactly you mean by cutting out.... does it just cease, or does it splutter and cough and die? If you've eliminated electronics, and with it the spark ignition, it sounds like either a fuel supply problem (fuel pump or injectors) or an air-fuel mix issue. If air-fuel, the most likely culprit is the mass air flow meter, which after some years and say a hundred thou km, becomes gummed up, and can't accurately measure the air flow into the engine, and thus determine the fuel to be added.
67 mths ago