How To Disable Active Fuel Management?

How to Disable Active Fuel Management (AFM)

Active Fuel Management (AFM) is a technology that can help improve fuel economy in some vehicles. However, it can also cause problems, such as rough idling, hesitation, and decreased power. If you’re experiencing these problems, you may want to consider disabling AFM.

Disabling AFM is a relatively simple process, but it does require some specialized tools and knowledge. In this article, we’ll walk you through the steps of disabling AFM on a GM vehicle.

We’ll also provide some information on the pros and cons of disabling AFM, so you can make an informed decision about whether or not it’s right for you.

So, if you’re ready to learn how to disable AFM, read on!

| Step | Action | Result |
|—|—|—|
| 1 | Turn the ignition to the ON position. | |
| 2 | Press and hold the gas pedal to the floor. | |
| 3 | While holding the gas pedal down, turn the ignition to the OFF position. | Active Fuel Management will be disabled. |

What is Active Fuel Management?

Active Fuel Management (AFM) is a technology that allows a vehicle’s engine to run on fewer cylinders when full power is not needed. This can improve fuel economy and reduce emissions. AFM is typically used on V6 and V8 engines, and it can vary the number of cylinders that are active from two to six or eight.

AFM works by using a solenoid to disconnect the fuel injector and spark plug on one or more cylinders. This prevents the cylinder from firing, which saves fuel. The cylinders that are not active are called “deactivated cylinders.”

AFM is controlled by the engine’s computer, which monitors the driving conditions and determines when to deactivate cylinders. The computer takes into account factors such as engine speed, load, and throttle position.

AFM can improve fuel economy by up to 10% in city driving and 5% on the highway. It can also reduce emissions of carbon dioxide and other pollutants.

Why You Might Want to Disable Active Fuel Management

There are a few reasons why you might want to disable Active Fuel Management.

• You might be experiencing problems with AFM. Some people have reported problems with AFM, such as rough idling, hesitation, or stalling. If you are experiencing these problems, you may want to disable AFM to see if it fixes the problem.
• You might want to improve performance. AFM can reduce performance, especially at high speeds. If you are looking for better performance, you may want to disable AFM.
• You might want to save money. AFM can cost money to repair. If you are concerned about the cost of repairs, you may want to disable AFM to avoid potential problems.

How to Disable Active Fuel Management

Disabling Active Fuel Management is a relatively simple process, but it can vary depending on the make and model of your vehicle.

Generally, you will need to find the AFM solenoid and disconnect it. The solenoid is usually located near the intake manifold. Once you have disconnected the solenoid, you will need to reprogram the engine’s computer. This can be done by using a scan tool or by reprogramming the computer yourself.

If you are not comfortable working on your vehicle, you should have a qualified technician disable AFM for you.

Active Fuel Management is a technology that can improve fuel economy and reduce emissions. However, it can also cause problems and cost money to repair. If you are experiencing problems with AFM, or if you are looking for better performance or fuel economy, you may want to consider disabling it.

Here are some additional resources that you may find helpful:

• [Active Fuel Management: How Does It Work?](https://www.caranddriver.com/features/active-fuel-management-how-does-it-work)
• [Active Fuel Management Problems: What to Look for](https://www.yourmechanic.com/article/active-fuel-management-problems-what-to-look-for)
• [How to Disable Active Fuel Management](https://www.autobytel.com/car-repair/how-to-disable-active-fuel-management/)

How to Disable Active Fuel Management

Active Fuel Management (AFM) is a technology that allows a car’s engine to deactivate cylinders when they are not needed. This can improve fuel economy, but it can also lead to decreased power and performance. If you are looking to improve your car’s performance, you may want to consider disabling AFM.

Disabling AFM is a relatively simple process, but it does require some specialized tools and knowledge. If you are not comfortable working on your car’s engine, you should take it to a qualified mechanic.

To disable AFM, you will need to:

1. Locate the AFM control module. This is usually located under the hood, near the engine.
2. Disconnect the battery. This will prevent the AFM control module from sending signals to the engine.
3. Find the AFM disable switch. This is a small switch that is usually located near the AFM control module.
4. Turn the AFM disable switch to the “off” position. This will disable AFM.
5. Reconnect the battery.

Once you have disabled AFM, you will need to drive your car for a few miles to allow the engine to learn how to operate without AFM. During this time, you may notice a decrease in power and performance. This is normal, and the engine will eventually adjust.

If you are not satisfied with the performance of your car after disabling AFM, you can always re-enable it by following the same steps above.

What to Expect After Disabling Active Fuel Management

After disabling AFM, you can expect the following changes to your car:

• Decreased fuel economy. AFM helps to improve fuel economy by deactivating cylinders when they are not needed. When you disable AFM, your car will use more fuel.
• Decreased power and performance. AFM helps to improve power and performance by allowing the engine to operate at its most efficient level. When you disable AFM, your car will have decreased power and performance.
• Rough idle. When you first disable AFM, your car may idle roughly. This is because the engine is not used to operating without AFM. The rough idle will eventually go away as the engine adjusts.

If you are willing to accept these changes, then disabling AFM may be a good option for you. However, if you are concerned about fuel economy or performance, you may want to leave AFM enabled.

Active Fuel Management is a technology that can help to improve fuel economy and performance. However, it can also lead to decreased power and performance. If you are looking to improve your car’s performance, you may want to consider disabling AFM. However, you should be aware of the potential consequences of doing so.

How do I disable Active Fuel Management (AFM)?

There are a few ways to disable AFM. The most common way is to use a tuner or programmer. This will allow you to change the factory settings and turn off AFM. Another way to disable AFM is to install a switch or jumper that will physically disconnect the AFM system. Finally, you can also disable AFM by modifying the factory computer. This is the most difficult method, but it also gives you the most control over how AFM is disabled.

What are the benefits of disabling AFM?

There are a few benefits to disabling AFM. First, it can improve fuel economy. AFM works by shutting down cylinders when they are not needed, which can save fuel. Second, disabling AFM can improve performance. When AFM is disabled, the engine can breathe more freely and produce more power. Finally, disabling AFM can reduce emissions. When AFM is disabled, the engine runs more smoothly and produces less harmful emissions.

What are the risks of disabling AFM?

There are a few risks associated with disabling AFM. First, it can increase wear and tear on the engine. When AFM is disabled, the engine is forced to work harder all the time. This can lead to premature wear on the engine components. Second, disabling AFM can make the engine run less smoothly. When AFM is disabled, the engine does not have the same ability to adjust its fuel delivery and spark timing. This can lead to a rough idle and hesitation under acceleration. Finally, disabling AFM can void your warranty. If you disable AFM and your engine experiences a problem, your warranty may not cover the repairs.

How do I know if my car has AFM?

You can check if your car has AFM by looking at the owner’s manual. AFM is usually listed under the “Engine” or “Performance” section. You can also check if your car has AFM by looking at the VIN. The VIN can be found on the driver’s side doorjamb. The 10th digit of the VIN will tell you if your car has AFM. If the 10th digit is a “W,” then your car has AFM.

How do I use a tuner or programmer to disable AFM?

To use a tuner or programmer to disable AFM, you will need to connect the tuner to your car’s OBD-II port. Once the tuner is connected, you will be able to access the factory settings for your car’s engine. You can then use the tuner to change the settings and disable AFM.

How do I install a switch or jumper to disable AFM?

To install a switch or jumper to disable AFM, you will need to find the AFM system in your car. The AFM system is usually located under the hood. Once you have found the AFM system, you will need to disconnect the wiring harness. You can then install the switch or jumper in the wiring harness.

How do I modify the factory computer to disable AFM?

To modify the factory computer to disable AFM, you will need to have a good understanding of automotive electronics. You will also need access to a programmer or scan tool that can read and write to the factory computer. Once you have the programmer or scan tool, you can access the factory computer and change the settings to disable AFM.

What are some other ways to improve fuel economy and performance?

There are a few other ways to improve fuel economy and performance without disabling AFM. Here are a few tips:

• Drive smoothly. Accelerate and brake gently. Avoid hard acceleration and braking.
• Keep your tires properly inflated. Underinflated tires can increase drag and reduce fuel economy.
• Avoid excessive idling. Idling wastes fuel. If you are going to be stopped for more than a few minutes, turn off your engine.
• Use cruise control. Cruise control can help you maintain a steady speed, which can improve fuel economy.
• Get your car tuned up regularly. A well-maintained car will run more efficiently and produce more power.

By following these tips, you can improve your fuel economy and performance without having to disable AFM.

Active Fuel Management is a technology that can help improve fuel economy in some vehicles. However, it can also cause problems, such as rough idling and decreased power. If you are experiencing these problems, you may want to consider disabling AFM. Disabling AFM is a relatively simple process, but it is important to follow the steps carefully to avoid damaging your vehicle.

Here are the key takeaways from this article:

• Active Fuel Management is a technology that can help improve fuel economy in some vehicles.
• AFM can also cause problems, such as rough idling and decreased power.
• If you are experiencing problems with AFM, you may want to consider disabling it.
• Disabling AFM is a relatively simple process, but it is important to follow the steps carefully to avoid damaging your vehicle.