Hi, Recently I encountered a strange problem of my Volvo car which is 1988 240 GL model. The car's engine would stop running when the fuel tank has less than 2/3 of the petrol. The situation became worse when the car was on the uphill slope at that time, the engine would not even be started. But if I moved the car to a level land when there was less than 2/3 of the petrol in the tank, the engine can be started but then the car would not be able to climb the hills. The problem disappeared when I add petrol into the "2/3 full" fuel tank. But it is a pain, since the car has a 60 Litres fuel tank, each time I had to add about 20 Litres of petrol even there still 40 litres left, and I dare not to drive far unless I am sure I can find a petrol station nearby. I'd greatly appreciate it if someone can shed some lights on this problem. Thanks very much. Best Regards Martin