Knowing What is Wrong with the Jeep Wrangler Vapor Canister
The Jeep Wrangler vapor canister is the heart of the Evaporative Emission Control System or EVAP system, and it consists of activated carbon. This substance has a granular structure through which it stores the fuel vapors that would otherwise escape and pollute the atmosphere. The purge valve, then, purges out the raw fuel back into the combustion process for recycling. If something goes wrong with the vapor canister, your vehicle's performance and drivability will suffer. That's why it is important to know what is wrong with the part. Here are a few symptoms:
The vapor canister has a filter at its base end. If the filter is clogged, the smell of the fuel will be emanating from vapor canister. Also, if you are used to overfilling your fuel tank, the vapor canister will end up getting soaked with gasoline, letting out that distinct fuel odor.
Wet bleeder hose
When the vapor canister is failing, the bleeder hose that is found on top of the vapor canister will be wet with fuel. The bleeder hose is bent upward and then downward to prevent siphoning action from the fuel tank. Simply stick your finger at the end of the bleeder hose to see if it is indeed wet with fuel.
When you notice fuel pouring out of the canister when it is running, the Jeep Wrangler vapor canister will no longer function and should be replaced. The outpour may be caused by the pressure or vacuum buildup in the fuel tank, especially when a faulty or wrong fuel tank cap is used. Take off the fuel tank cap and start your vehicle again. If there is no longer any fuel pouring out of the vapor canister, the wrong or faulty cap is the cause of the problem. This symptom is also quite dangerous because it can cause a fire, so it is imperative to replace it immediately.
This problem can be caused by a defective purge valve. When the purge valve goes bad, it causes leaking in one of the hoses. Sometimes, the leaks can be as tiny as a pin prick, and one way to discover this is by using a smoke machine.