This may sound weird but it could be your thermostat
causing your car to think its running tooo cold
thus throwing more gas in to make it run hotter?
this was happening to me then i got a new thermostat
A forum community dedicated to Mazda 3 and all Mazda vehicle owners and enthusiasts. Come join the discussion about MazdaSpeed performance, modifications, classifieds, troubleshooting, maintenance, and more!