EZL ignition system
The EZL ignition system works based on the signal received from the crank angle sensor. The ignition system sets the required ignition timing based on information about engine speed, crankshaft position and intake manifold vacuum obtained from sensors mounted on the engine.
A distinctive feature of the EZL ignition system is that it is impossible to adjust the initial ignition timing by turning the distributor housing relative to the shaft.
However, the initial ignition timing can be changed depending on the type of fuel used. To do this, you need to change the position of the switch plug in the tuning socket located in the engine compartment next to the ECU. Resistors of various resistances are installed in the switching plug. The plug can be installed in several positions according to the marks on the plug. Depending on which plug resistor is currently connected to the socket pins, the ignition ECU increases or decreases the initial ignition timing in 3°increments.
The ignition timing can also be measured using a stroboscope.
TFZ ignition system
The TFZ ignition system is controlled by a pulse sensor installed inside the ignition distributor housing. In this case, the initial ignition timing can be adjusted by turning the distributor housing relative to the shaft.
Checking the ignition timing
Attention! The ignition timing must be checked with the engine warmed up to normal operating temperature. It is advisable to complete the ignition timing test before the coolant temperature exceeds 95°C or before the radiator fan turns on.
Determining the ignition timing from the mark on the crankshaft pulley, aligned with the pointer
1. Connect the stroboscope according to its instruction manual. In this case, the start of the stroboscope must be carried out from the high-voltage wire of the 1st cylinder.
2. Start the engine at idle speed. Aim the strobe light at the pointer on the timing chain cover. The mark on the crankshaft pulley appears to be stationary and should line up with the pointer. If the mark moves to one side or the other, then the idle speed is unstable. When checking the ignition timing, all electrical consumers must be turned off and the radiator fan must not work. When the engine is idling for some time, even when the engine is warmed up to normal operating temperature, especially when the outside temperature is high, the idle speed may be erratic.
3. Determine the ignition timing from the mark on the crankshaft pulley, aligned with the pointer (see picture).
4. If the ignition timing differs by more than 3°from the required one, the plug in the tuning socket may not be installed correctly. Check the position of the plug in the adjustment socket and, if necessary, set it according to the type of fuel used.
Ignition timing adjustment
Attention! Ignition advance adjustment is only possible on models with a TSZ ignition system.
1. Adjust the ignition timing with the engine off to avoid electric shock. Loosen the ignition distributor mounting bolt.
Attention! Put an alignment mark on the ignition distributor housing and cylinder head so that the ignition distributor can be set to its original position when trying to adjust the ignition, which ended in failure.
2. To increase the ignition timing, turn the distributor housing clockwise, and to decrease it counterclockwise. Tighten the ignition distributor mounting bolt and, using a stroboscope, check the initial ignition timing. Repeat this operation until the desired initial ignition timing is reached. tighten the ignition distributor mounting bolt to the required torque and disconnect the stroboscope.