If you have a GMC Sierra or a Chevy pickup and you notice that your gas mileage suddenly drops when changing modes, it may be because your truck has an AFM. This feature was introduced to help GM trucks meet EPA fuel economy standards. But its implementation has been problematic, clunky, and damaging to your truck’s engine. The good news is that you can disable the AFM with aftermarket accessories.
Many drivers turn to a mechanic to fix these problems, but the only way to guarantee success is to buy an AFM-delete kit and install it yourself. While it may sound daunting, you can do it yourself without having to hire a mechanic. AFM-delete kits will cost you around $100.
An AFM lifter is a component that is used frequently and can wear out quickly. This component is designed to increase engine pressure when more power is needed. Over time, a faulty AFM lifter can lead to low power levels. If the lifter isn’t operating properly, it can cause engine misfires. It will also reduce your mileage.
Should I Disable AFM?
AFM is a technology in modern cars and trucks that helps to improve fuel economy. It can also reduce oil consumption. However, it has some drawbacks. It allows oil to get into the combustion chamber and burn, but sometimes it gets into the cylinders. Over time, this oil hardens and damages the pistons.
To avoid AFM from affecting your vehicle, you can buy an AFM disabler. It is easy to install and is relatively inexpensive. Make sure you buy from a reliable distributor to get the right device for your vehicle. Some of the best AFM disablers include built-in functions. For example, some allow you to set shift points and rev limiters, and adjust the speedometer for tire size changes.
If you want to take your vehicle performance to the next level, you should install an AFM disabler. These devices can also be controlled by your smartphone. You can use them to tweak engine settings and adjust fuel efficiency. Some of them also let you adjust shift points in automatic transmissions, so you can save fuel with each shift.
Can You Turn Off Active Fuel Management?
If you’re tired of your truck’s misfiring, you can disable active fuel management (AFM) with a device called an AFM Disabler. This device plugs into your truck’s OBD-II port and will turn off the AFM system. This will enable the engine to rev up and run more efficiently. This will also improve the exhaust note.
Active Fuel Management, or AFM, is a technology GM created to conserve fuel during low-power driving situations. It works by shutting off half of the engine’s lifters and putting the truck in 4 cylinder operation mode. The downside of AFM is that the system can cause problems such as oil consumption, fouled spark plugs, and failed lifters. Some owners have experienced failures of this technology in the past, and it can be tricky to repair. In many cases, you’ll have to remove the cylinder heads to perform the repair.
If you’d rather not risk your warranty, you can turn off AFM. This can be done at any time – even before you take the car to the dealer. Using an AFM disabler will ensure that the engine isn’t over-powered, but will also help protect the engine and prevent engine failure. Disabling AFM will also prevent it from damaging other parts of your truck.
What Happens When AFM Lifters Fail?
There are several reasons why AFM lifters fail in a truck. In some cases, a failed lifter can lead to major engine failure. Other times, a faulty lifter can cause a check engine light to come on or an engine to sputter or even shut down. Regardless of the reason, you should be aware of the signs and symptoms of AFM lifter failure in order to avoid a major engine problem.
If you have experienced engine failure, you may have a failed AFM lifter. However, it is also possible that your engine is misfiring or that your cylinders are not firing correctly. Another sign of AFM failure is jerking of the vehicle while driving. It is important to take your truck to a mechanic for further inspection as a failing AFM can cause major engine damage.
Oil Pressure and Quality: One of the most common causes of AFM failure is low oil pressure or dirty oil. If the oil pressure is too low, the lifter can’t lift the engine, which could lead to engine failure. Dirty oil can also clog the solenoid and pins. In any case, the symptoms of AFM failure in a truck are the same as those of a general engine misfire.
How Do You Prevent AFM Lifters From Failing?
If your truck has an AFM lifter, there are several ways to prevent it from failing. First, be sure to get it serviced regularly. AFM lifters are expensive to replace, and if you leave them in your truck, they can destroy the engine. The problem with AFM lifters is so severe that GM was recently sued in Michigan. However, the company resolved the situation by replacing the defective parts with equivalent parts.
Another way to prevent AFM lifter failure is to make sure that you are using the right type of oil in your vehicle. This is important because AFM lifters need oil to function properly. Low oil levels cause excessive friction between moving parts, which can eventually cause the lifter to fail.
Another common cause of AFM lifter failure is the use of low-grade oil. This type of oil has more impurities than high-grade oil, which causes it to break down and cause failure. This type of oil is not good for the engine, as it does not lubricate its moving parts very well. This will result in engine misfires and lower mileage than you should expect.
Does AFM Cause Lifter Failure?
Symptoms of AFM failure can include hesitation while accelerating, loss of power, or stalling. If you notice any of these symptoms, then you should have your truck checked out by a mechanic. In many cases, a faulty AFM can also be the cause of a check engine light.
AFM is a system that controls the flow of engine oil by activating and deactivating a valve. This valve controls how the motor oil flows through the lifter mechanism. The lifter system is located on top of the engine block and consists of different parts. These parts include the AFM cover, solenoids, and oil pressure senders. The tower and oil passages of the AFM are also located in the engine block.
Active Fuel Management (AFM) is a technology developed by General Motors to increase gas mileage. This system, also known as Displacement on Demand, can increase gas mileage by up to five percent. However, AFM is a controversial technology and some drivers complain that it’s noisy. It’s also not very powerful, and some drivers may prefer the power of a V8 engine.
What Year Silverados Have Lifter Problems?
Lifter problems have been reported on the 2019 and 2021 Chevy Silverados. The failure of the lifters can cause engine misfiring. The lifters are critical to the operation of the engine, allowing the valves to open and close properly. In the worst case, a malfunctioning lifter can damage the pushrod, which in turn can damage the cylinder and eventually, the entire engine.
Lifter problems are caused by the failure of the internal spring in the lifter. This spring locks the lifter in the fire position. If this spring breaks, the lifter will not start properly, resulting in a solid misfire. This is dangerous for any driver and can cause engine stalling, hesitation when merging, and even car crashes.
The lifter failure has also been reported on the GMC Sierra, Yukon, and Cadillac Escalade. Owners have been waiting weeks to have their vehicles repaired. The lifters in these vehicles need to be replaced. Fortunately, there is a fix for this problem.
Which GM Engines Do Not Have AFM?
Active Fuel Management (AFM) is a GM technology that reduces fuel consumption by shutting half of the cylinders of an engine during low-load or cruise conditions. It claims to improve fuel efficiency by five to fifteen percent. However, this technology is not without its downsides. Among these drawbacks are lifter failure and oil consumption.
It also makes the engine less reliable and causes the vehicle to run hotter. While it is possible to find a vehicle without AFM, there are some exceptions. For example, if you’re looking for a Ford F-150, you’ll need to look at the 5.3 and 6.0 engines. Both of these engines come with AFM, and the 4.8 and 6.2 don’t.
You’ll find information about AFM in the owner’s manual of your 2008 Silverado. The AFM doesn’t display on the dash unless you have a DCI button rack in your dash. In addition, the AFM will turn off DIC messages if it detects a system problem.
Learn More Here:
3.) Best Trucks