Signs of a throttle valve that does not close completely may include increased idle speed and fuel consumption, while signs of a throttle valve that does not open completely may include the engine not developing full power, insufficient engine responsiveness, jerks and dips in engine operation while the vehicle is moving. Contamination of the throttle valve with crankcase gas deposits usually results in unstable engine operation at idle. The throttle valve drive is electric, and is controlled by the electronic engine management system unit. Special equipment and qualified personnel are required to repair the electric drive. If the above malfunctions occur, first try cleaning the throttle valve (for example, with a solvent or a special carburetor cleaner in an aerosol package). If this does not lead to a positive result, replace the throttle assembly.
You will need: TORX T30 key, Phillips-head screwdriver.
1. Disconnect the wire from the negative terminal of the battery.
2. Slide the wiring harness connector lock upwards…
3. …and disconnect the connector from the throttle body cover.
4. Remove the four screws securing the throttle assembly to the intake manifold…
5. …remove the throttle assembly…
6. …and a sealing ring installed under its flange.
NOTE: Replace the O-ring if it is severely compressed, hardened or torn.
7. If the throttle body was not removed for replacement, clean the contaminated throttle body with carburetor cleaner.
8. Remove oil and other contaminants from the cavity of the intake pipe.
9. Install the throttle assembly in the reverse order of removal.
NOTE: Pay attention to the markings on the throttle assembly. Purchase a throttle assembly with the same markings.
