The 2005 Cavalier could have a fuel leak. Have the entire fuel system checked, as a fuel leak can cause a dangerous fire.
Thermostate stuck closed or low on anti-freeze or pluged heater core or bad water pump or the the A.C to heat deverter valve (if equipt) not operating correctly
Have your ball joints checked out.
the first thing to check is the manifold air temperature sensor
it could be a few things, but id check the thermostat as its probly stuck open, or your heater core could be bad but that will cause a water leak in your car and its a pain to change. or you can check your heater hoses for sludge.. because 50/50 anti freeze tends to cause that
No, a clogged heater core will not make it overheat. A leaking heater core will.
i was wondering whether the switch at the parking brake could affect this problem.
The 1989 Chevy Cavalier could be either a 2.0L 4-cylinder or a 2.8L V-6.
It could be that you need coolant or it's low.
A broken rod is usually caused by a binding problem. The piston could be stuck or the rings may be damaged.
If I could answer this question, then I wouldn't be asking it. Now would I?
If coolant level is correct - could be a defective sensor