87 bronco 2 rpugh idle and runnin rich

[dch1992]

bronco was running very rich i replaced the egine coolant temp sender last night made a big difference still running a bit rich and has a rough idle when warm or cold o2 was replaced about 100 miles agow but it has been running rich so the new o2 is all black...should i replace it? any other thing i should no about or somethings that might help

thnx

 

[Epixstar]

look for vacuum leaks try to pull codes if you can