when my petrol gets bout below half a tank and i am driving the car does some weird things.. ill go to accelerate and it will do so but than it will cut out an cut back in an i will lose acceleration an than it will jolt back an go again it mainly happens when the turbo is kicking in it can anyone help,.. i know its a terribly explanation but its hard to say... its an r32 wit hks bov an 3" exhaust ... gtst