If these faults occur, first try adjusting the throttle actuator or replacing the cable (see "Checking and adjusting the throttle cable"). If this does not produce a positive result, replace the throttle assembly.
You will need: a socket wrench (head) "on 13", a screwdriver with a cross-shaped blade.
Attention! It is prohibited to unscrew the screws 2 securing the throttle valve. If they are then poorly tightened and locked, the loosened screw may fall into the engine cylinder and cause it to fail. The throttle position is adjusted at the factory, so it is not recommended to touch the throttle adjustment screw 1.
1. Drain the engine cooling system (see "Replacing the coolant").
Note: If you have some experience, you may not need to drain the coolant. When the engine has cooled down, release excess pressure in the engine cooling system by unscrewing and then screwing the cap of the expansion tank. Prepare plugs of a suitable size, which you will use to seal the hoses immediately after disconnecting them from the throttle assembly. The loss of coolant with this method will be insignificant.
2. Disconnect the wire from the negative terminal of the battery.
3. Open the hood and remove the decorative engine cover (see "Removing and installing the decorative engine cover").
4. After pressing the clamps, disconnect the wiring harness connectors from the throttle position sensor…
5. …and idle speed control.
6. Disconnect the air supply hose from the throttle assembly (see "Cleaning the crankcase ventilation system").
7. Loosen the clamp of the first throttle body heating hose…
8. …and remove the hose.
9. Loosen the clamp on the second throttle body heating hose…
10. …and remove the hose.
11. Loosen the mounting clamp…
12. …and disconnect the small branch hose of the crankcase ventilation system from the throttle assembly fitting.
13. Loosen the clamp securing the purge hose of the adsorber…
14. …and remove the hose.
15. Disconnect the throttle actuator cable from the throttle assembly sector (see "Checking and adjusting the throttle cable").
16. Unscrew the two nuts securing the throttle assembly…
17. …and remove the throttle assembly from the intake manifold studs.
18. If, when replacing the throttle assembly, the idle speed control valve and throttle position sensor are not installed on the new assembly, transfer them from the old assembly.
To do this, unscrew the two screws that secure them.
Note: Replace the damaged foam ring located under the throttle position sensor.
19. Clean the dirty throttle assembly with carburetor cleaning fluid, after removing the sensor and regulator from it. Also clean the dirty regulator and sensor (it is prohibited to use solvents for cleaning).
20. Install the throttle assembly and all removed parts in the reverse order of removal.
21. Adjust the throttle actuator (see "Checking and adjusting the throttle cable").