Idle speed adjustment point on models with idle speed compensator
The idle speed adjustment point is indicated by an arrow.
Attention! On models since 1994, the indicated interval for this procedure is 30,000 km.
Before checking idle speed and mixture composition, check:
- setting the ignition timing;
- the condition of the spark plugs;
- accelerator cable (on carburetor models - also a throttle cable);
- hoses of the crankcase ventilation system;
- air filter element;
- exhaust system;
- compression and valve clearance.
1. Warm up the engine to normal operating temperature and make adjustments within 2 minutes without stopping the engine.
2. If the electric radiator cooling fan turns on, adjust only after it is turned off.
Models with a carburetor
3. All electrical consumers must be turned off, the air damper is fully open.
4. If the car does not have a tachometer, connect the tachometer according to the instructions.
5. Check the idle speed and compare it with the data given in subsection 3.1.1 (V subsection 3.3.1 for engines 1.4 dm3).
Attention! Air-conditioned models have an idle compensation device.
6. Using an appropriate screwdriver, screw in the set screw (to increase speed) or unscrew as necessary to keep the engine idle at the correct speed.
7. The CO content in the exhaust gases has been adjusted at the factory and no further adjustment is required. However, after a major overhaul of the carburetor, re-adjustment can be made.
8. The CO content in the exhaust gases can only be adjusted at a Peugeot workshop.
9. The idle speed adjustment screw is capped to prevent accidental adjustment. To access the screw, remove the plug with a sharp tool.
10. Screwdriver to turn the screw (indicated by an arrow) adjusting the mixture very slowly until the desired CO level is established. Turning the screw clockwise decreases the CO content, and vice versa, turning the screw counterclockwise increases the CO content.
11. After adjusting the CO content, install a new plug plug and, if necessary, adjust the idle speed.
Models with fuel injection system. Fuel injection system Bosch L. 3. l-Jetronic
12. All electrical consumers must be turned off.
13. If the car does not have a tachometer, connect the tachometer according to the instructions.
14. Check the idle speed and compare it with the data given in subsection 3.1.1.
15. The idle speed is adjusted by screwing the screw into the throttle body. Turning the screw clockwise decreases the idle speed.
16. The CO content in the exhaust gases can only be adjusted at a Peugeot workshop.
17. The idle speed adjustment screw is located on the airflow meter and is capped to prevent accidental adjustment. To access the screw, remove the plug with a sharp tool. Screwdriver to turn the screw (indicated by an arrow) adjusting the mixture very slowly until the desired CO level is established.
Bosch ML4 fuel injection system. l Motronic
18. The idle speed is not adjustable, but is controlled by the idle speed control valve.
19. The CO content in the exhaust gases can only be adjusted at a Peugeot workshop.
20. The idle speed adjustment screw is located on the airflow meter and is capped to prevent accidental adjustment.
21. Turning screw (indicated by an arrow) clockwise, increase the CO content, and vice versa, turning the screw counterclockwise, reduce the CO level.
Bosch LU2-JETRONIC fuel injection system
22. The content of CO in the exhaust gases is automatically controlled by the ECU.
23. Idle speed adjustable by screw (2).
Bosch Motronic MP3 fuel injection system. L
24. All electrical consumers must be turned off.
25. If the car does not have a tachometer, connect the tachometer according to the instructions.
26. Idle speed adjustable by screw (1).
27. The CO content in the exhaust gases can only be adjusted at a Peugeot workshop.
28. The idle speed adjustment screw is located on the airflow meter and is capped to prevent accidental adjustment.
29. Turning screw (2) clockwise, increase the CO content, and vice versa, turning the screw counterclockwise, reduce the CO level.
Bosch Motronic MI fuel injection system. 3
30. The idle speed is controlled on the XU9JA/Z engine only, on other engines it is controlled by the idle speed control valve and the ECU.
31. All electrical consumers must be turned off.
32. If the car does not have a tachometer, connect the tachometer according to the instructions.
33. Check the idle speed and compare it with the data given in subsection 3.1.1. Idle speed adjustable by screw (7).
34. The CO content can only be adjusted on the XU9J4/K engine, on other engines the adjustment is made by the ECU.
35. The CO content in the exhaust gases can only be adjusted at a Peugeot workshop.
36. The CO adjustment screw is located on top of the air flow meter and is capped to prevent accidental adjustment.
37. Turning screw (5) clockwise, increase the CO content and vice versa, turning the screw counterclockwise, decrease the CO level.
Magneti Marelli engine management system
38. On models with a Magneti Marelli engine management system, mixture adjustment is possible only by reprogramming the ECU using special electronic test equipment.