Cleaning throttle body help!!

[tmontague]

Originally Posted by lh59

Realized this is an old thread, but can I reach throttle body by just unscrewing F and clean it from there? When my aircon is on, the engine sometimes sputter and dies while on idle.

That's all I did to clean my TB and it worked well. I used an old tooth brush and TB cleaner, kept the butterfly open and sprayed inside and then brushed any carbon out. It seemed to work well.

That was 15,000km ago and I noticed lately that my car seems to idle around 500RPM and then I can feel a slight rumble and it will rise up briefly to 600 and then back down. I wouldn't necessarily call it a "rough idle" but it is noticeable while being stopped most of the time. Anyone know the recommended cleaning interval for the TB? I'm surprised if a dirty TB is what is causing this issue since I cleaned it not that long ago. I'm also using an oil catch can FWIW.