Hi have a 2006 kia sedona with a whining noise which sounds like a bearing noise from cambelt area.Customer said noise came on about a day ago,and now engine managment light on/reduced power.Code rear system,codes p0088,fuel press too high,p0087 fuel press too low,p0330 knock sensor?? all stored.All cleared o.k.Have stripped cambelt off,cannot find any roughness or noise from any roller or tensioner.Fuel pump slightly stiff to turn,but possibly just action of high pressure pump??.Should it freewheel easy.Have cut open fuel filter-no signs of any metal.Any ideas. Nigel.