General Servicing: Ignition: Distributor

All models are equipped with electronic ignition. California 4000 and 5000 models and all 5000 Turbo models use an idle stabilizer in addition to the Hall Effect ignition system. Some models without the idle stabilizer may have an impedance transformer in its place.

On the Quattro, a digital timing control system is used. Engine speed, manifold pressure, intake air temperature, coolant temperature and throttle position readings are used by a central control unit to adjust ignition timing.