ok guys need help tryin to figure this one out.

car symptoms: rough idle like as if were misfiring but its not main thing is overheatin then drops temp then overheats and then drops again and then just stays high

what i've done so far: new aluminum radiatior, water pump, replaced all hoses and radiator cap

my guesses which i havent tried yet but are thinking: radiator fan gone bad, heater core (maybe bypassing it) coolant temp sensor



what do you guys think before i attack the car again when i get it back???