Help! My 156 is very poorly. It's a 1.8 W reg. Variator is very noisy, not sure whether to drive it or plough with it, then it started only running on 3. A bit of investigation revealed cylinder number 4 not firing. Today cylinder 3 gave up the ghost. I've had the plugs out and they were pretty caked up so have changed them. Also changed coils and injectors for used but definitely working ones. Made no difference. Makes a jingling noise so think maybe the cat has gone? Any ideas? Thanks Steve.