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. 5.3). Replacing the plug in a different position connects another resistor between the socket pins - this changes the setting of the ignition ECU, which steps the ignition timing earlier or later than the main one.
Pic. 5.3 Timing compensator socket shown in position using 95 octane unleaded petrol
4. You can determine the ignition timing in the usual way using a stroboscopic pump, as described below.
Note: The engine must be warmed up to normal operating temperature. It is best to carry out the check but the moment when the engine temperature rises to 95°C, or before the radiator fan turns on.
5. 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.
6. 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.
7. Determine the ignition timing from the pointer on the chain cover and the marks on the crankshaft pulley.
8. Compare the value with technical data. On models with the EZL system, if the ignition timing lags by 3, the compensator block may have been. installed incorrectly. 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.