It could be manythings:
clogged radiator- coolant flow or air thourgh it
low coolant level - straight anti freeze in the summer
thermostat stuck closed
fan clutch went bad
electric fan inop. faulty motor, blow fuse, relay or a short
have seen a clogged catalytic converter cause it due to an exhaust restriction
an engine that is run lean would also run hot
having the a/c on in the summer, stuck in traffic will cause it to run higher than normal, but not dangerously
If your towing a heavy load can cause a vehicle to run hot
No it can not. If the belt is missing that could cause it to run hot.
Yes.
Yes
Yes but it will cool down
no a bad fuel pump will not make your run hot it will cause it not run like it should and eventually stop running at all
Usually the rad is not providing enough cooling and the extra heat provided by the a/c working can make it run hot.
definetly and run hot very hot when it gets hot immediately turn your car off or you will throw a rod or blow the motor up
yes it will make bring unmetered oxygen in and the o2 sensors will pick it up and it will run lean (lean=hot) (rich=cool)
yes but i would start with the thermstat that will cause the car to ouer heat also Yes.
If stuck open the car will run cold. If stuck closed the car will run hot.
I think you would know if you needed a freeze out plug for you would be losing coolant & losing coolant would make your ride run hot.
Low anti-freeze makes a car run hot going 70 mph.