Signs of a throttle valve that does not close completely may include increased idle speed and fuel consumption, and if the valve does not open completely, the engine does not develop full power and is not responsive enough, jerks and dips in its operation are observed when the car is moving. Contamination of the throttle valve with deposits from crankcase gases usually leads to unstable engine operation at idle. The throttle drive is electric, it is controlled by the electronic unit of the engine management system. Special equipment and qualified personnel are required to repair the electric drive. If these faults occur, first try to flush 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. Loosen the clamp securing the air supply hose to the throttle assembly pipe and remove the hose from the throttle assembly neck.
3. Slide the wiring harness connector lock upwards…
4….and disconnect the block from the throttle body cover.
5. Remove the four screws securing the throttle assembly to the intake manifold…
6….and remove the throttle assembly.
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.
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