Hi I drive a utility 1.4 2015 bakkie, it started cutting a bit but not switching off, usually when I was traveling at hight speeds of about 70+, It went like that for a few months then now it's struggling with idle and when driving it cuts like someone is switching fuel on and off again, the Guage does not go below half tank, it started by not going below quarter empty and now it's not going below half. Please help I don't know what to do