My 2001 Beetle is having trouble starting when gas gets around 1/4 tank. When tank is full, no problem at all. It DOES start when gas is low but takes a few seconds cranking - which it does not do any other time. If I turn the key and hold it (without turning it over) a few times before trying to start the car it does start a bit more easily. Any ideas?

 

pump might be going out