Time for the Hyundai GDI to have a intake valve cleaning with CRC ... Spraying into the throttle body intake requires some disassembly of air dam and awkward to get an easy spray pattern into the throttle body (doable but a pain) . The vacuum hose coming off the PCV fitting is super easy to get to - the feeling though is I might not reach all 4 cylinders intake valves equally for cleaning as well this way versus another vacuum line (brake booster ?) or sticking with the throttle body intake ... Your thoughts ?