Car was serviced at 140000km its now on 146000km aircon needs to be filled with gas and car is making a weird noise when I take my foot of the petrol sounds like the same noise as what cv joints would but definitely not cv or wheel bearings. I assume it could just be the heat shield on the flange of exhaust as it only started when I had the free flow fitted. Also the idle control sensor i have replaced now 2 times each time I do it its a faulty part according to gwm which will not refund or exchange the part however the car is eating petrol bad and its either a hole on the petrol tank or the idle control sensor. I cannot sit without my vehicle so if im booking it in I will have to bring it early morning and collect afternoon