Driving my 2001 civic 250k 80mph . Felt like something cut loose. I lost most power. I got off hiway . Still had all electrical but it felt like car was half in neutral half in drive. Was able to drive it like this for almost half a mile. I parked in a lot. Checked it out. Oil and water looked good. I started the car again (it started but ran a tiny bit rough) and the temperature guage just started climbing. Never had an issue with it overheating until that point. Need to know if i junk or fix

 

First thing you need to figure out is this a tranny issue or an engine issue. (Sounds like trans.) check fluid, see if its full or burnt or what it might be. Scan for codes and go from there, If the engine or trans is requiring major repair its simply not worth it, replace with lower mileage used unit. If it is the trans and the engine is fine, Id still see about replacing them both as a unit, 250k on a 7th gen Civic is just about the end of its usable life.