hope someone can help me out with this, there's a noise that sometimes comes from the rear of the car after shut down. quite loud, but disappears before i can get under the car.
hard part is describing it. it's not a buzzing sound and i don't think it's the fuel pump as it doesn't sound muffled as though it's in the tank. sounds like a small foghorn, lasts for a few seconds then dies away. almost like a seal letting go under pressure and then sealing again as the pressure decreases.