What is an EVAP canister purge solenoid?
The canister purge valve is a vital part of the Evaporative Emission Control System (EVAP). The EVAP system seals the fuel system of your vehicle to prevent harmful fuel vapors from entering the environment. In newer model vehicles the purge valve is electrically operated solenoid controlled by the engine computer.
What is a canister purge solenoid in an EVAP system?
The canister purge valve is an integral component of the EVAP system, but also one that is subject to failure over time. What is a canister purge solenoid, and how can it make or break an EVAP system? The “evaporative emission” in EVAP refers to the vapors that naturally occur when fuel meets air.
How long does a canister purge solenoid last?
Normally the canister purge solenoid lasts the life of the vehicle, but it can wear out from time to time. If the canister purge solenoid starts to go out, the Check Engine light will come on and your car will not pass an emissions test. In addition, the buildup of fumes inside of the canister can cause your vehicle to stall or misfire.
What happens when a canister purge valve goes bad?
When a component in this system, like the canister purge valve (also known as a purge valve solenoid), goes bad, it can cause rough idling, a Check Engine light, or difficulty starting your vehicle. It is best to fix an EVAP system leak as soon as you notice there is a problem.
What happens when you put a purge solenoid in your car?
In addition, the buildup of fumes inside of the canister can cause your vehicle to stall or misfire. The canister purge solenoid works by absorbing the fuel vapors with activated charcoal. Activated charcoal sucks up and absorbs the fuel vapors until the vehicle is started and is being driven by you.
What does the EVAP canister actually do?
A charcoal canister or EVAP is an essential part of a vehicle . Every vehicle has a fuel tank that emits a flammable gas vapor. When the vehicle is in action, the temperature will rise and its fuel will evaporate then become vapor.
What does an EVAP purge solenoid do?
The EVAP purge solenoid controls the flow of vapors from the EVAP system to the intake manifold. This normally closed solenoid is pulse width modulated (PWM) by the control module to precisely control the flow of fuel vapor to the engine. The solenoid will also be opened during some portions of the EVAP testing,…
What does a faulty EVAP purge solenoid cause?
When the purge solenoid fails, it will cause problems for the EVAP system, which will affect the vehicle’s emissions output levels. Usually, a bad purge solenoid will display a few symptoms that can alert the driver that a potential problem has occurred and needs to be serviced.
What are the symptoms of a bad canister purge valve?
One of the first symptoms that a faulty canister purge valve may produce is a rough idle. In this case, you will notice the car running inconsistently while stopped or driving at low speeds. If the canister purge valve fails and sticks open, it will create a vacuum leak that can affect the engine idle speed and quality.