General description
1. Since 1990, 1.8 liter carburetor models have been equipped with various versions of the microprocessor ignition timing system (MSTS). This later version, known as the El Plus system, has a self-diagnostic tool that can be used by a technician using a dedicated TECH 1 electronic tester. This is a significant help in troubleshooting.
2. The late El Plus ignition system is very similar to the earlier system except for the following replacements.
- a) There are no restrictions on the octane number of fuel for the ignition system. The ignition timing is set so that the engine will normally run on unleaded petrol and does not require any modification: if desired, leaded petrol can also be used without adverse side effects.
- b) Testing the ignition timing is no longer possible without the use of specific Vauxhall/Opel electronic test equipment.
3. Taking into account the points from point 2, all other actions can be performed using the information given for early 1.8 liter carburetor models in Section 4.
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