Using the standard huge factory solenoid valve. It's hard for me to understand why the valve is so big, if it's not suitable for cruisecontrol.

After plugging in the extra manifold nipple, air can now be controlled: I tuned idle-air controller

* P,I,D = 45,25,10 (decimal. If I remember correctly! TODO: upload mcd/mct)

** integral_decrease_limit=10, integral_increase_limit=33

It recovers reasonably when the big fan starts (even if idle target at warm is 770 RPM: I keep that at 800 RPM though). If ECU switched the big coolant fan (70A relay), we could raise idle beforehand, that would be even better.