I just bought a used MY2014 gts86 from a local Mazda dealer in perth Western Australia less than a week ago. Although the car is still with the dealer, I have been doing a lot of research on the car ever since and only until yesterday did I find this major fault called "cricket noise" and it is a high pitch noise generated by the High Pressure Fuel Pump when idling. Also, I found mostly the US and Canadian and sometimes the British owners discussed this issue frequently, but such discussion was not often found on Australian forum. Just wondering if any of the 86 owners from Australia have this issue as well ? or perhaps the premium gas, such as BP 98 RON eliminates the noise, as mentioned by the US owners?
Thanks in advance!