I touched a real-world 50 mpg in an '84 CRX with the 1500cc CVCC engine— not the ridiculously stingy HF model, mind you— and it wasn't slow. But… well, just look at this diagram!

The n75 solenoid controls the turbo wastegate or VNT vanes with either vacuum or pressure. b4 Passat - on firewall above coolant reservoir, a3 Jetta - on pass side near air box, a4 Jetta/Golf - on ...