If you have a damaged or worn out purge valve, this could possibly cause the Check Engine light to come on. There are dozens of reasons for the Check Engine Light to illuminate on your dashboard. Here are five things to look out for: 1) Check Engine Light You need to understand what these symptoms are if you are going to tell the difference between the two possible problems. If you have a bad vapor canister purge valve, the symptoms that you experience will potentially be worse than the symptoms of a bad charcoal canister. The vapor will just sit in the charcoal canister until it is needed again. Once it allows enough vapor through, the purge valve will close so that no mater vapor gets through. This is the central computer of the vehicle which will calculate the exact amount of vapor that needs to go into the engine. If you have an electronic purge valve, then the engine control unit manages it. From there, the vapors are sent into the internal combustion chamber where they will be ignited with the fuel and air mixture. When the purge valve opens, the fuel vapors can access the intake manifold.
How Does a Vapor Canister Purge Valve Work? Older vehicles use vacuum operated purge valves while newer vehicles used electronically operated ones. The purge valve lies within the vacuum line to allow these vapors into the intake manifold at the appropriate time. There is a vacuum line that connects the intake manifold with the charcoal canister that contains the fuel vapors.
How Does a Vapor Canister Purge Valve Work?.
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