Hi Honda members,
what is Hex Key function on the IACV? can we calibrate it via changing the position of its Screw? There is a spring behind the Hex Screw which pushes the spindle regulating the Idle RPM depends on excessive engine loads of A/C, Steering Wheel , Hi Beam Lights & Defugger , Heater Fan etc, under command of ECU. althogh set up of IACV calibration is done at factory and it seems out of reach of others, but it seems that tension of the spring forced in by the screw may subject to changes over time due to heat and pressure, so wonder to know if anyone knows the proceedure how to regulate the presure inside the IACV via this screw? Should we ignore it at all and go for replacing it with new IACV incase the position of the screw is changed ?
thanks and welcome any guides and sharing technical explanation about the question.