I have the same machine and same squeaky noise with my fmq foot....upon some examination, if I squeeze the foot so spring depresses, I can see and hear that there is some rubbing (the shiny surface has been rubbed off) on the pin the spring is around (no clue on the technical names....LOL)....I haven't oiled it for fear of excess running down and getting on fabric, but neither do I have any other ideas on getting rid of the squeak.