Hey guys im new to the forums... I have a 1993 mazda 323 im having a couple of problems. I bough this car used and if had no manual thus why im coming here

So problem number 1 is that my fuel air mixture seems to be running a little richer then i would like. how could i adjust this?
2) My car when i 1st gear at a stopped light shakes alot. any suggestions?

the last problem i have is there is a wire loose under my steering column. its the Dashboard and Tail light wire, i don't know where to plug it back in. does anyone know where i could find the socket?

Thanks guys