Hi guys im new here, I have a mazda astina 180se 1999 and I would like to know how to tune it correctly? Its heavy in fuel and there is an adjustment thing on top left near radiator what is that for? Also when its idling u can smell the fuel and its not leaking anywhere?

 

Hi Mits. Welcome. You probably need to start from the engine specs? I searched on youtube and saw one tuned Astina 180Se. Take a look