Benefits of EVAP Delete: Pros and Cons

EVAP delete is a great way to reduce tank pressure and make your fueling system compatible with your new upgrade. The modification to your car comes with its pros and cons that need careful consideration.

This article will look at the meaning of EVAP deletes, its pros and cons, and provide helpful answers to some questions about EVAP delete. Let’s begin!

What is an EVAP System?

The EVAP system is also called the Evaporative Control System. It is responsible for stopping gas vapors from getting into the environment.

Instead of sending unburned vaporized gasses which escaped the combustion system, it redirects it.

The vapor is turned to the intake system, where it will end up in the engine to be reused (burned).

Furthermore, the EVAP system comprises many components that ensure the atmosphere is free from gas vapors.

These components include the fuel tank, EVAP vapor canister, hoses, valve, tank pressure sensor, separator, and fuel tank cap.

The hoses or lines are responsible for passing the gasses to the EVAP storage where they are stored. When the engine starts and moves, the ECM decides the right time to release the gasses into the engine.

Can I delete my EVAP system?

Yes, It is possible to delete your EVAP system. However, it must be done right to avoid complications and further damage.

EVAP delete involves removing a part or all of the EVAP system of your vehicle.

It may include removing the storage canister, parts of the vent line, or any part to achieve the desired result.

Removing the storage canister puzzles you with what to do with the vent line. The vent line carries gas vapor from the engine tank to the canister to be stored.

Many have chosen to leave the vent line open by routing the line from the tank back to the bottom to resolve this. It prevents gas from easily escaping.

Unfortunately, rerouting the line might not be the right solution, as gasses may still be able to find a way out. It could cause a severe gas smell and make driving uncomfortable for you and your passengers.

Also, bypassing the sensor responsible for the storage canister would be the best option. The check engine and other warning lights will be triggered if you do not bypass the sensors. You will also receive a series of related error codes.

If you have an error code and check the engine light related to the EVAP system, you may not pass the emission test.

Pros & Cons of EVAP Delete

EVAP delete is a modification that many people have done on their vehicles for compatibility with other modifications.

EVAP delete pros and cons, which will be listed below.


1. Reduce tank pressure

The EVAP delete is a way for redirecting gas vapor to the engine to be used.

In some cases, these gasses become too much in the canister, which could affect fuel consumption and the fuel pump.

If this is the case with your vehicle, it means your vehicle’s fuel tank is not breathing well. One solution to this problem is to delete the EVAP.

People usually remove the vehicle’s canister and leave the vent line. The lines will be connected appropriately, but one will be left out to reduce pressure in the fuel tank.

2. Compatibility with Standalone ECU

There are many modifications people have made to their vehicles.

The thing about these modifications is that they might not be compatible with many stock parts on your car.

It is the same with ECU modifications; they are not always compatible with your vehicle’s stock parts. You will either need to tune the ECU or the parts that are not compatible.


1. Error codes

One disadvantage of deleting the EVAP system is the constant warning light and error codes. It happens when no significant modification is done to the ECU after deleting the EVAP.

The EVAP system makes use of a sensor called the tank pressure sensor. Once the EVAP is removed and the sensor picks up the correct reading, an error code will come up during diagnosis.

2. Gas smell

One of the most common disadvantages of EVAP Delete is the gas smell. There have been complaints that there is an obvious smell of gas around the vehicle after the modification. You will smell it when driving and also when parked.

In addition, this often happens when the delete process is not done properly. Many leave the line open without restriction to the gas coming from the fuel tank.

What you could do when you are faced with this kind of problem with an EVAP delete is install a valve. When the pressure builds up to a certain level, the valve opens and lets the pressure out.

The valve does not solve the problem but will reduce the smell, especially when your vehicle is parked.

3. No added horsepower

If you are considering the EVAP Delete for house power gain, then you should not have the modification done on your vehicle.

The modification is done to improve tank breathing and the flow of fuel. It is also done to be compatible with other modifications. All these have nothing to do with your vehicle’s performance and horsepower.

4. Increase fuel consumption

There have been complaints about increased fuel consumption after EVAP delete. It could result from the vapor being released instead of redirected to the engine.

The gasoline vapor serves as gas, as it is flammable, which is why it is redirected to the engine. It helps reduce fuel consumption while also reducing the pressure on the fuel.

Final Thoughts!

Now you understand the advantages and disadvantages of deleting your EVAP system, you can better decide on having the modification done.

Also, consider that the EVAP system is integral to your emission system. Removing the approach might mean you will not pass an emissions test.

However, the modification depends on what you try to achieve with your vehicle. If you want more horsepower from this modification, it is not for you.

  • Edmond Davis

    I'm Edmond Davis, an automotive expert with years of experience in vehicle repair, performance, and safety. I graduated from the University of Michigan with a degree in Automotive Engineering and have worked with major companies like Ford, GM, and Chrysler. I'm a trusted source of information for anyone looking to learn more about cars or improve their driving experience.

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