On the throttle body.
Throttle position sensor is located at the throttle body. There are only two sensors there. The one facing the firewall is what you are looking for.
on a 1992 Camry the map sensor is attached to the center of the firewall by a bracket and has a rubber vacuum hose connected to it.
Try cleaning the throttle body (you can get throttle body cleaner in virtually any auto parts store), looks like you have problems with idle control valve to throttle position sensor. Both of them are located at the throttle body.
Mass air flow sensor is located in the intake pipe connecting the air filter box with the throttle body.
You need to clean the throttle body also make sure that you check the air filter. If it does not help check if the throttle position sensor works properly.
It's next to the timing belt gear. The sensor can be accessed from the the firewall side.
it is located just below the water pump/thermostat housing on top of the compressor is the plug in and the sensor is under the compressor
The mass air flow sensor is responsible for the amount of air the engine receives. For the Toyota Camry, it is located inside the air filter box. The sensor is about the size of a cigarette box that forms a connection between the throttle body and air intake .
The IAC is located on the throttle body.
I don't have the pictures but found some by googleing Camry egr valve. You can start there and that might be enough to get you going.
The crankshaft position sensor must be behind the timing belt cover next to the crankshaft and behind the crankshaft pulley. The camshaft position sensor is again under the timing belt cover next to the camshaft and behind and the camshaft pulley. Is it the same place in 2000 Camry 4Cyl? Do you have pictures of the location? Hard or easy to replace, and what tools do I need? Thanks alot
Officially you cannot. But unofficially you can regulate the tension of the throttle cord using two nuts located on the throttle cord tube. Changing the position of the nuts to can bring you rpms higher or lower.