hiya guys can you lot help me sort some probs with my 92kreg 4by first central locking will work on drivers door but double locks on passengers door eg locks then unlocks with 1 turn of key changed motor any idears also surging to 3thousand when hot and surging about 15 hundred rpm when cold don`t do it all the time i know a little about cars but not enough canyou guys help me out ? also all new springs,shocks torx brakes and pads trackrod ends and bottom arms still got a knocking noise on lock drive shafts checked and ok only knocks once also poly bushed alround help me please i`ve run out of idears