Ignition system VEZ (VW Golf 2)

The fully electronic ignition system of the VEZ type is a transistor equipment with an electronic control system. This system is designed to control the ignition advance based on a correspondingly designed characteristic. For normal ignition purposes, this is realized by two regulators of centrifugal and reduced pressure. In the electronic ignition system, the optimal ignition point is determined by several engine operating parameters.

These are the engine speed, engine temperature and engine load at the moment, the gear engaged in the gearbox. The ignition advance angle is selected in order to achieve the best mixture conditions. Modern engines operate at the highest possible compression ratio, since then the use of fuel is more profitable. However, at a high compression ratio, uncontrolled explosive combustion may occur.

Constantly occurring explosive combustion can lead to engine damage. To prevent this, it is necessary to use an explosive combustion sensor, which registers abnormal combustion and delays ignition. This sensor is fixed to the engine block and is connected by a wire to the ignition system of the VEZ or Digitant type.

If any control parameter is missing, malfunctions in determining the ignition advance angle characteristic may occur. This may cause, for example, a decrease in engine power and/or an increase in fuel consumption.

[The original information is posted on the website: VWmanual]