I have eg sr4 with b20bvtec. I have this problem since i use regulators. i dont understand why when the engine is hot it idle very high 1500-1600rpms. I already fix the tps clean the throttle body and still the same. I found out theres iacv in my throttle body without a sensor on it. i cant find the sensor. does anyone know where did the iacv sensor wires located at? That would be very great and helpful!