Our MX6s seem to rattle a bit when cold. (I think its a Jap car think) Use 89 gas instead of 87 will help. You may have something loose, and have to remove the cover and check bolts down the header connectors.
A forum community dedicated to Mazda MX-6 owners and enthusiasts. Come join the discussion about restorations, performance, upgrades, modifications, classifieds, troubleshooting, maintenance, and more!