Carburetor models
1. One of the distinctive features of contactless ignition systems is the high stability of the once set basic ignition advance. During the operation of the car, the initial angle practically does not change.
2. The need to adjust the basic settings arises after replacing the ignition distributor, belt/chain or timing gears/sprockets.
3. Checking the ignition timing angle setting is performed when deviations in engine operation appear or when fuel consumption increases.
4. Connect the strobe according to the manufacturer's instructions. The strobe's inductive sensor terminal is connected to the high-voltage wire on the right. Power is supplied directly from the battery terminals.
5. Start the engine, preheated to normal operating temperature, and leave it running at idle speed.
6. Direct the beam of light generated by the stroboscope at the mark on the crankshaft timing pulley and the indicator scale on the timing belt cover. The total scale range is 0°÷20°, the division value is 5°. To make it easier to read, the "5°" mark on the cover, as well as the mark on the pulley, can be highlighted with chalk or white paint.
7. The basic value of the ignition advance angle should be between 0° and 4°, otherwise you should turn off the engine and loosen the bolt on the distributor housing. Then start the engine again and, observing the marks illuminated by the stroboscope, achieve their correct alignment by rotating the distributor housing (to avoid the risk of electric shock, handle only the metal body of the distributor, and never its cover). Turning the distributor counterclockwise increases the ignition timing angle, and vice versa.
8. Once the adjustment is complete, turn off the engine and firmly tighten the bolt on the distributor housing, making sure that the latter does not accidentally become displaced.
Models equipped with fuel injection system
On models equipped with fuel injection systems, the ignition timing is constantly monitored by the ECU of the engine management system. Manual adjustment is not provided and, if necessary, can only be made using special electronic equipment. There is no need to talk about a basic value, since this parameter is continuously adjusted by the ECU in order to maintain stability of idle speed (for more details, see Section General information).