General description
1. The ignition advance control system is designed to optimize the combustion process.
Pic. 12.1a Ignition advance control system (models with carburetor)
Pic. 12.1a Ignition advance control system (models with injection)
Control
2. Warm up the engine.
3. Connect the tachometer according to the manufacturer's instructions.
4. Disconnect the hose from the diaphragm of the vacuum advance regulator and connect it to the vacuum gauge. If there are two hoses on the distributor, connect a vacuum gauge to the inner hose (closest to distributor).
5. Start the engine and at idle check for vacuum:
- A) if there is a vacuum, go to step 6.
- b) if there is no vacuum, check hoses and connections for leaks or blockages.
6. Connect a hand vacuum pump to the ignition timing diaphragm tube and stoboscope according to the manufacturer's instructions. Start the engine and apply a vacuum of 20 mm Hg. Art.
When applying vacuum, the ignition timing must change.
- A) if the advance changes, the system is in order;
- b) if the lead does not change or you fail to achieve a vacuum of 20 mmHg. Art. - diaphragm leaks, replace it (chapter 4);
- V) if the vacuum is sufficient, but the advance does not change, stop the engine. Remove the distributor cap. Check the ease of rotation of the breaker disk (turn it left - right). If the breaker disk rotates easily, replace the diaphragm and check it.