How does the Chevy AFM system work?
The Chevy Active Fuel Management (AFM) system is a technology that helps improve fuel efficiency in Chevrolet vehicles by temporarily deactivating some of the engine's cylinders when full power is not needed. This allows the engine to operate more efficiently and consume less fuel during certain driving conditions.
How the Chevy AFM System Works
The Chevy AFM system works by continuously monitoring the vehicle's driving conditions, such as speed, load, and acceleration. When the system detects that the engine does not require full power, it will automatically deactivate some of the engine's cylinders. This is done by closing the intake and exhaust valves on the deactivated cylinders, effectively shutting them down.
The number of cylinders that are deactivated can vary depending on the driving conditions. For example, during light-load situations, such as cruising on the highway, the system may deactivate up to four of the engine's eight cylinders. This helps to reduce fuel consumption and improve overall efficiency.
When the driver requires more power, such as during acceleration or when climbing a hill, the AFM system will reactivate the deactivated cylinders to provide the necessary power. This seamless transition between cylinder activation and deactivation is designed to be unnoticeable to the driver, ensuring a smooth and responsive driving experience.
Benefits of the Chevy AFM System
The primary benefit of the Chevy AFM system is improved fuel efficiency. By deactivating cylinders when they are not needed, the engine can operate more efficiently, reducing fuel consumption and emissions. This can result in a noticeable improvement in fuel economy, especially during highway driving.
Additionally, the AFM system can help to extend the engine's lifespan by reducing the overall workload on the engine. By deactivating cylinders, the remaining active cylinders are working harder, which can help to distribute the wear and tear more evenly across the engine.
Limitations and Considerations
While the Chevy AFM system is generally effective, there are some limitations and considerations to keep in mind. The system may not be as effective in stop-and-go traffic or during aggressive driving, as the frequent transitions between cylinder activation and deactivation can reduce the overall efficiency gains.
Additionally, the AFM system relies on various sensors and components to function properly, and any issues with these components can affect the system's performance. Regular maintenance and inspections are essential to ensure the AFM system continues to operate as intended.
Overall, the Chevy AFM system is a valuable technology that can help to improve fuel efficiency and reduce emissions in Chevrolet vehicles. By understanding how the system works and its potential benefits and limitations, drivers can make the most of this fuel-saving technology.
Can GM AFM be turned off?
An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. It prevents the computer from switching over to 4 cylinder mode. It's a simple and effective way to turn off the AFM system. It will also improve the sound of the exhaust.
What causes AFM lifters to fail?
We have found that most lifter faults are caused by oil pressure issues, or control issues. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM.
What controls AFM lifters?
The veal ohm turns a solenoid off as oil flow stops spring. Pressure forces the latching pins out locking. The inner body to the outer body to engage the push rod.
Does AFM actually save fuel?
The fuel mileage is rarely affected allowing you to continue the same MPG you had before we deactivated the AFM to save thousands of dollars on repairs! Not to mention the hassle of being broke down on the side of the road or in a strange city on vacation.
How does the Chevy AFM work?
How does it work?
- The computer sends a signal to the LOMA.
- The LOMA solenoids open.
- Oil flows to the special lifters through the AFM towers.
- The oil collapses the plunger inside the lifter.
- The collapsed lifters will not engage the pushrods and both valves remain closed.
Is there a class action lawsuit against GM for lifter failure?
Which vehicles are impacted? The GM engine valve-lifter class action lawsuit seeks damages for anyone who purchased or leased any 2014 to 2021 Buick (see also Buick lemon law), Cadillac, Chevrolet, and GMC vehicle equipped with a 5.3L, 6.0L or 6.2L V8 engine, and include the following cars: 2014 to present GMC Sierra.
What year did Chevy 5.3 have lifter problems?
The models affected are Chevrolet Silverado trucks from 2016 to present and, most particularly the 2021 models with 5.3L and 6.2L engines.
How much does it cost to replace AFM lifters?
Expect to pay somewhere between $1000 and $2,500 to get a professional to replace an engine lifter.
How do I know if my range afm disabler is working?
On the latest AFM DISABLER Modules, the four blue lights are basically to indicate the unit is operating. THEY WILL GO OUT WHEN THE VEHICLE IS NOT RUNNING as described below (Power Saving). The lights are as follows: LED #1 - Power is ON and unit is AWAKE and vehicle is ready for commands.
Can you disable AFM with a scan tool?
For some drivers, these changes in engine performance are distracting or unwanted, which leads them to disable AFM altogether. While there are many ways to disable the system, using a scan tool is one of the most direct methods, and it can often be done without needing any extra devices or hardware.
