General provisions
Models with EZL ignition system
1. The EZL type ignition system is interrupted by an electronic signal generated by the crankshaft position sensor. The ignition control system determines the correct ignition timing and contact angle according to engine speed, crankshaft position and intake manifold vacuum. Information about these parameters comes from sensors located on the engine (for more information see paragraphs 1 and 7).
2. Unlike non-contact ignition systems, which are interrupted by a rotor mounted on the distributor shaft, the ignition timing in the EZL system cannot be changed by rotating the housing relative to the distributor shaft.
3. However, the basic ignition timing setting can be changed in steps to match the fuel being used. This is achieved by a compensator socket located in the engine compartment next to the ignition ECU. The socket has a plug that contains fixed resistance resistors. The block can be installed in the socket in various positions, indicated on the top of the socket (see fig. 6.3). Replacing the plug in a different position connects another resistor between the socket contacts - this changes the setting of the ignition ECU, which steps the ignition timing earlier or later than the main one by 3°. For more information refer to Chapter 5 part B paragraph "Ignition timing - check and installation".
Pic. 3.Z. Timing compensator socket (shown by arrow)
4. You can determine the ignition timing in the usual way using a strobe lamp, as described below.
Models with TSZ ignition system
5. The system is interrupted by a sensor fixed inside the distributor housing. This design means that the main ignition timing can be adjusted by turning the housing relative to the distributor shaft. Similarly, if the distributor is removed, the ignition timing should be checked and adjusted as described in the next section.
Ignition timing check
Note: The engine must be warmed up to normal operating temperature. It is best to check before the engine temperature rises to 95°C, or before the radiator fan comes on.
6. Connect the stroboscope to the engine according to the manufacturer's instructions so that the stroboscope is started from the high voltage wire of the 1st cylinder.
7. Start the engine and let it idle. Aim the strobe light at the pointer protruding from the chain cover. The stroboscopic effect "to freeze" movement of the rotating ignition timing mark on the crankshaft pulley/vibration damper relative to the fixed mark on the casing. Moving the mark forward or backward indicates an unstable idle speed - make sure all electrical devices are turned off and that the radiator fan is not spinning. The engine must be warmed up to normal operating temperature, but the speed x.x. may become erratic on a particularly hot day or if the engine has previously been idling for a long time.
8. Determine the ignition timing from the pointer on the chain case and the marks on the crankshaft pulley / vibration damper (see fig. 6.8).
Pic. 6.8. Determine the position of the pointer on the target housing relative to the marks (shown by arrows) on crankshaft pulley/vibration damper
9. Compare the value with technical data. On models with the EZL system, if the ignition timing lags by 3, the compensator shoe may not be installed correctly. Refer to the Technical Data section and check that the plug position matches the type of fuel. Please note that idle speed ignition advance values are determined in the mode with and without vacuum from the intake manifold.
Ignition timing - adjustment
Note: This procedure only applies to TSZ ignition systems - see "General provisions" at the beginning of this section.
10. To adjust the ignition timing, first turn off the ignition to avoid the risk of high voltage electrical shock. Refer to paragraph 4 and loosen the distributor clamp bolts.
Note: Before adjusting, it is recommended to mark with paint the relative position of the distributor housing and the engine. This will allow you to return to the original ignition point if for any reason the installation is disturbed.
11. Turn the distributor a small angle clockwise to increase or counter-clockwise to decrease the ignition timing. Slightly tighten the bolts and recheck the ignition timing with a stroboscope. Repeat these steps until you reach the desired ignition timing. After that, securely tighten the distributor clamp bolts and disconnect the stroboscope.