It sounds nice on idle it's when it warms up I little then when driving it it sounds like its staving for fuel and dose a little popping thru air filter and it just won't pick up speed if input my foot down more it just sounds like its starving for fuel and will just do little piping thru air filter I've put a new fuel filter on it and still the same and like iv said bfor I've done erro codes and it comes up as speed sensor but bfor this problem started I use to drive it and it was going fine check light would come on and the only thing that would happen it wold start crackaling thru exhaust wich I think it's o2sensor I askt a bloke at Holden and he said its the o2sensor but it's not coming up on the check codes thanks just wondering if it was the plugs n leads it would miss on idle and miss straight away of driving it or can thay just brake down when thay heat up