1. Checking the ignition timing is not possible on a 2.0 liter engine equipped with a Motronic engine management system. On the 1.8 liter engine, the ignition timing can be checked as described in the following paragraphs, although no adjustment is possible as this is done automatically by the electronic control unit. The procedure can be used if damage is suspected or if any of the ignition system components have been replaced.
2. Start the engine, warm it up to normal operating temperature, then shut it off.
3. On carburetor models, disconnect the vacuum hose from the electronic control device located in the right rear corner of the engine compartment.
4. On versions with a fuel injection system, disconnect the connector from the throttle valve switch, connect together with jumpers clamps 18, 3 and 2 inside the connector.
5. Connect the tachometer and strobe to the engine (cylinder number 1 from the front of the engine).
6. Check that the octane connector near the brake booster is set to "98" on a black plastic bracket. If it is set to 95, unfasten the plug, turn it around.
7. Start the engine, accelerate it to the specified speed.
8. Aim the stroboscope at the left side of the crankshaft pulley and check that the notch in the pulley is aligned with the pointer on the rear drive cover.
9. Stop the engine. Install the throttle switch connector or control box vacuum hose, if equipped.
10. If the ignition timing is checked again, the increased advance must be set as in the Specifications. There are no additional marks on the crankshaft pulley, however some strobe lights may have a way to set the advance by reading the one obtained in step 8, then reading the increased timing after completing the procedure given in step 9. Alternatively, the crankshaft pulley can be marked in degrees.
11. Stop the engine, disconnect the tachometer and stroboscope.
12. If necessary, reinstall the octane plug in the required position.
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