its under the hood on the passanger side on thefender wall its a 2 in cilinder piece attacher to a rather large hoes
above the rear end on the drivers side
It is located on the firewall above the back of the valve cover on the driver's side of the engine. It is mounted with a rubber and slides up and off the mounting bracket.
It is mounted to the frame of the truck just in front of the fuel tank.
The evaporative emissions (EVAP) canister purge solenoid on a 2003 Chevrolet Silverado 1500 with a 4.8 liter engine is located behind the throttle body, near the front of the engine. I have a picture of it that I could send to your email if you want.
In the 2001 Toyota Corolla the evap purge solenoid valve is located near the underside of the air cleaner. This is an emissions control device.
The leak detection pump failing seems to be an issue on these cars. It is located near the fuel tank. It could also be the purge solenoid, located under the air filter housing.
First you have to remove the air filter housing, to see the carbon canister with hoses. The canister is oval, from top view. There are two evaporative emissions devices that connect to this canister. One is the Purge Valve Sensor, it is like a one inch black box with wire connectors and two connectors for tube on top. The other is the evaporative emissiong purge soleniod. It is usually a white plastic cylinder, about 2 inches long and also with two connectors for tubing. Make sure you make note of the correct direction of the two tubes when replacing or cleaning. The solenoid will show an arrow indicating direction to motor.
You need to clarify your question as to what you are referring such as engine or evaporative system.
What does the solenoid control?
Not sure what pressure control solenoid is, could it be the fuel pressure regulator?
It is located on the upper right rear of gas tank. You have to remove tank to access it.
You're going to have to be more specific with your question. There are many components to the emissions control system.