Here again Robin, first off, checked the new auxillery air valve was working with a can & how water, all fine. Fitted to engine, very hard to start, continual cranking, then when going, revs all over the place. Been in touch with Heywood Jaguar in Rochdale who told me to get ECU checked/sorted & if no better get back to them. So this is my plan now unless any other member has any idea’s ?????????