Help!! I carried out a swap by putting 843a1000 monobloc with 176b9000 head and overhead. Now I find myself with a phased engine with kit, 1.2 16v iaw control unit, 1.2 16v intake manifolds, 1.2 16v audio (which is the same as that of the 1.4). The problem is that the engine runs very badly, it seems to have 2 cylinders. The candles all spark. What could I have done wrong or what should I do?