Sorry for the poor title. I just don't know how to explain it better. It is getting colder here in ZA now with night temperatures aroudn 10 degrees celcius. Of late I noticed the when starting my vehicle in the morning that the fuel would gurgle all along the pipes from the fuel tank to the front of the vehicle. It sounds like air is trapped in the pipe and then it runs along the length of the pipe. I have two fuel tanks with OE fuel pumps and both fuel lines are doing it (by the sounds of it). One would typically explain this sounds as the same as when air is trapped in the water pipes in the house and the whole house would resonate the sound when the tap gets opened. My truck is starts on the 4-6th swing and it has not had any starting problems. When the vehicle has driven a distance then it would not do the gurgling again. I have only heard it after it stood for example overnight when it is cold. Whether it is truely related to temperature or standing for a period of time I don't know. I am using the same garage for fuel and the fuel filter is new. Where do I start?