Car will not idle at low temp, revs really low misses when high temp 90 over revs

Clutch was replaced on monday, since will not idle proberly starting hunting removed throttle body clean and refitted stopped hunting. When enigne is cold over revs at 1200 and when temp is at 90 revs drop to 800 and starts missing. Been connected to analyiser lambda 1.200 so indicates over fueling, maybe injector fault but I feeling more towards a temp fault. What do you think????