Well I jumped in and cleaning my TB today... what a filthy mess it was, had been suggested to give cleaning it a shot to chase better fuel economy and its not like it cost me anything! I used a old tee shirt with alcohol on it and rubbed it to clean it up as I could, unfortunately the thing was so caked up there were some areas where I had to use a old credit card to get the caked nastyness off. She was far from perfect by the time I finished but the machined surfaces were clean and that's what I was aiming for, I also spent a bit of time cleaning the edge of the butterfly as it had quite a thick layer on it.
Before
After
Key things I did (no idea if these will ward off the dreaded ETC issues or not)
- Removed negative line from battery
- Unplugged TB
- Cleaned
- Bolted it all back together
- Connected battery
- Left the car in "ON" position for 3 minutes (while I updated by BlueDriver)
- Started car and checked for codes
Got a catchcan to mount somewhere but think I'll want to put it on the passenger side which will need a longer pipes for sure