Description Good quality ignition amplifier. Often called… TCI control unit TZH control unit. Black box. Ignition amp. Ignition control unit. Ignition module. So many names for the same thing. All it does is read the signal from the Hall sensor in the distributor and amplify it to a level that the ignition coil can use. They often fail, sometimes they give warning they are going with misfires and the like. Aftermarket part from Febi as an alternative to the Beru items we also stock.
