Going haywire, which typically means going out of control or becoming disorderly, can have several antonyms depending on the context in which the term is used. One antonym could be "functioning correctly," as going haywire often means something is not working as it should. Another antonym could be "calm and orderly," as going haywire implies chaos and disarray. A third antonym could be "stabilized," indicating that a situation has been brought under control. Other possible antonyms for going haywire might include "steady," "predictable," or "unfaltering," all of which suggest a sense of consistency and reliability.