not functioning properly; "something is amiss"; "has gone completely haywire"; "something is wrong with the engine"
Roughly-made, unsophisticated, decrepit (from the use of haywire for temporary repairs; Originated because of frayed wires sitting near hay in a hot barn, which caused an explosion. The barn ceased to exist, and it was referred to as having gone "haywire.")
If something goes haywire, it goes out of control or starts doing the wrong thing. Many Americans think their legal system has gone haywire. go haywire to start working in completely the wrong way (From the use of hay-tying wire for quick repairs)