Hi there,
When throttle bodies gets clogged with dirt, there is no other alternative except to clean them. Dirt would stick along the air passages and in time they would build up a layer which would affect the air passages and cause idling issues. Rebuilding is not required if it is just clogged with dirt. There are no permanent solutions to this build up of dirt.
Depends on what problem the throttle is causing, it can affect performance and fuel consumption.
When was the cleaning last done?
Workshop owner
Diploma in Automotive Engineering, 30 years working experience.
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If there is wear on the throttle plate spindle, then replacement/rebushing of throttle body might be required. However that is not a permanent solution as mentioned earlier. Dirt would accumulate over time. These are 2 separate conditions.
If it is clogged with dirt, cleaning would do. A worn throttle plate or spindle would cause erratic idling even after cleaning.
Yes, 40,000 km is a reasonable period to clean the throttle again.