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General Discussion / Re: Throttle Body Balancing
« Last post by Huzo on April 14, 2026, 11:12:17 PM »Another update on this topic as I have been thinking a lot about it recently and finally got it sorted.
I have removed the air damper on the stepper inlet.
Then I altered the factory secret screw - not by turning the screw itself, but by loosing the bracket that holds the secret screw stop element and then by tightening it again and altering the throttle body in the closed position by about 0.2 - 0.3 degree less than before. Problem sorted and the engine now idles at the right rpm cold or hot.
It means that the factory calibration could have been a little out of spec and the engine was getting too much air on idle.





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