Accelerating will feel like you’re pressing the pedal down and moving slower. The engine may feel like its running “weak” and won’t generate sufficient power for acceleration. On top of a rough idle, a vehicle with a failing EVAP canister purge valve will display signs of poor engine performance. It needs to be addressed as soon as possible, as it could lead to your engine stalling completely. A vacuum leak can also be caused by a broken or damaged purge solenoid or any of the hoses attached to it. If the canister purge valve fails and sticks open, it will create a vacuum leak that can affect the engine idle speed and quality. In this case, you will notice the car running inconsistently while stopped or driving at low speeds. One of the first symptoms that a faulty canister purge valve may produce is a rough idle. Usually, a bad purge solenoid will display any of the following 5 symptoms that can alert the driver of a potential problem in need of servicing. When the purge solenoid fails, it will cause problems for the EVAP system, which will affect the vehicle’s emissions output levels. The canister purge solenoid - also referred to as an EVAP canister valve - is responsible for “purging” the EVAP system by acting as the switch that allows the vapor into the engine. The EVAP system traps this vapor in a charcoal canister and recirculates it for use as fuel for the engine and prevented from polluting the environment. Modern vehicles are equipped with an EVAP system that works to reduce the evaporative emissions pollution that can come from the vehicle’s fuel tank, which is released in the form of vapors. The canister purge solenoid is an emissions control component that is commonly found on the evaporative emission control system (EVAP) of many modern vehicles.
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