Just quickly....Oranoco was making a valid point (very knowledgeable geezer). Its all too common to have a fault on a MFI RST that ends up being the DV. They don't really do do anything for an MFI car, its just a bit of a standing joke between us when DV's are mentioned

Now......you mixture screw

I have heard people saying they have drilled them out, exactly what this involves im not sure myself Indeed though this definatly isn't doing you any favours. Can you get a picture up, im still not completely sure exactly sure in what way its broken