Your Evap emission control system has either failed or is operating less effectively than usual. The best solution is to bypass Evap canister. Are you curious to know how to bypass an Evap canister?
Bypassing an EVAP canister is considered daunting, but don’t worry; this guide has it all covered! In this write-up, I will provide you with detailed instructions on “How to Bypass an Evap Canister?”
I will also list some of the top reasons for you to consider bypassing the Evap canister. So, keep reading to the end if you want to know what’s in it for you.
Why Bypass the Evap Canister?
Before I move towards the steps to bypass the Evap canister, let me first highlight some common reasons why you might need to bypass the Evap canister.
Reason #1: Faulty Purge Valve
One of the more commonly experienced vehicle issues among car owners is when their engine purge vacuum doesn’t close fully and causes their Check Engine light to illuminate.
Note: Sometimes, the car with a key symbol can also appear on your dashboard. Know more about it here.
As a result, vehicles become more challenging to operate after a fuel pump from the fuel tank. Hence, bypassing EVAP canister becomes necessary to resume the efficient performance of your vehicle.
Reason #2: Worn Out Charcoal
Inside the canister’s vapor storage is activated charcoal with multiple pores that absorb and release vapor when the purge valve opens and closes.
However, charcoal’s porosity is affected by many factors. When operating the car, it crushes charcoal particles to turn them into fine powder. Accidentally spilling liquid fuel or condensed gas vapors into a charcoal canister can also damage its pores.
Once particles lose the ability to trap gas, they may eventually clog the fuel vapor vent line. Leading to a faulty canister in need of a bypass to avoid charcoal powder hindering engine bay performance.
Reason #3: Blocked Nozzles
Vapor storage nozzles are constantly exposed to the environment, which can result in them becoming clogged with dirt and mud. This can severely affect the fuel vapor vent line, thus requiring a bypass.
However, by regularly cleansing these outlets, gas fuel will continue to flow efficiently through them.
Reason #4: Damaged Charcoal Filter
Over time, fuel filters at both ends of a vapor storage canister may wear down and allow charcoal into the purge control valve, causing issues with the canister. This calls for an Evap canister bypass.
11 Ways to Bypass the Evap Canister?
There may be times when it is necessary to bypass your EVAP canister temporarily, and should this become necessary, this step-by-step guide will help you immensely.
Step #1: Locating The EVAP Canister
Most commonly, an EVAP canister is found near either the engine bay or fuel tank of a vehicle. However, this may vary for every car because of its specific make and model. Therefore, please consult your vehicle’s service manual or online resources to pinpoint its accurate location.
Step #2: Disconnect The Negative Battery Terminal
To ensure safety and reduce any electrical mishaps, disconnecting the negative terminal of your vehicle’s battery is an essential step to eliminating electrical sparks during this process.
Step 3: Locate The Canister’s Input and Output Lines
An EVAP canister consists of two main lines: an output line leading back to the engine intake manifold and an input line connecting to the fuel tank. So, before going further, identifying both these lines is crucial.
Step #4: Disconnect The Input Line
While working, be careful as there may be residual pressure or fuel in the line; take caution and use pliers or wrenches to disconnect and loosen its connection from the EVAP canister carefully. Make sure to have a proper container ready in case any spilled fuel escapes the line.
Step #5: Disconnect the Output Line
Once again, using an appropriate tool, disconnect the output line from the EVAP canister. And remember, residual fuel or vapors might escape during disconnection – similarly to the process of disconnecting the input line, be cautious.
Step #6: Install A Bypass Line
In order to bypass the EVAP canister, a bypass line must be connected directly from your fuel tank to the engine intake. Measure and cut an appropriate length of fuel-rated hose so it bridges this distance between points A and B.
Step #7: Connect Your Bypass Line
To connect the bypass line, connect the first line to the fuel tank’s input line and the second one to the engine intake. Also, use hose clamps to ensure these connections are secured tightly and don’t have any leaks.
Step #8: Secure Loose Connections
Preventing fuel or vapor leaks might prove crucial to both you and the environment; make sure to thoroughly check all connections – ensure they are tightened securely enough.
Step #9: Reconnect The Negative Battery Terminal
Once all connections are secure, reconnecting the negative terminal of your vehicle’s battery should restore power to all vehicle systems and resume all functions properly.
Step #10: Test The System
Start your engine and allow it to run for several minutes while keeping an eye out for any unusual behaviors or leaks in your vehicle. If there are any discrepancies, shut off immediately and recheck all connections as soon as you detect an issue.
Step #11: Monitor The Vehicle
It is essential to keep in mind that bypassing an EVAP canister may activate a “Check Engine” light or other error codes in your vehicle’s diagnostic system. For your safety and the well-being of others, closely monitor your vehicle for any indications of trouble and have it examined by a qualified mechanic as soon as possible.
Conclusion
This is all on How to Bypass Evap Canister that you need to know before moving on to the actual process.
In this guide, I have talked about some of the top reasons why your vehicle’s Evap canister might require a bypass.
I have also given a step-by-step tutorial on how to bypass the Evap canister and how you can test your system once the process is complete. However, it is recommended to consult a professional mechanic for diagnosis and repair.
Hopefully, this guide will help you bypass the Evap canister the next time you face any problem with it.
