turn the ignition key so all lights are on the dash,then start the car. every so often a bubbling noise comes from the fuel
tank it lasts for up to 20 secs and then stops before i start the car. now when this happens the drive is awful not smooth at all. i have had an uprated fuel pump to stop this matter but it still happens.is it possibly the fuel pump relay?also i even took the fuel cap off to listen and its definately coming from the tank.