Can You Turn Off Cylinder Deactivation


Can You Turn Off Cylinder Deactivation

You may want to turn off cylinder deactivation when you don’t need the full energy of your car’s engine. Most car models, let’s say luxurious cars are equipped with a powerful engine. Their operations are comparable to none. And that’s why we feel their performance on highways and in an emergency.

To turn off cylinder deactivation means to switch off the operations of some cylinders in the car’s engine. If your car is performing at increased performance. This will lead to poor fuel economy. You can turn off cylinder deactivation to conserve fuel. This will also reduce the engine’s performance of your car.

Let’s say you drive a car running on six cylinders. You can turn off cylinder deactivation and have three cylinders to power your car. Though, cylinder deactivation is not seen in a car model. And if it’s seen in yours, you can’t just disable them with a click. Some drivers don’t like the consumption rate of all cylinders.

A Quick Answer To Turn Off Cylinder Deactivation

It is very possible to turn off cylinder deactivation if your car has the option. However, some cars’ cylinder deactivation can’t be turned off so easily. You will need to work around the system to understand how to turn off cylinder deactivation. In this article, we will look at how to install AFM/MDS/VCM disabler or delete kit. This is the application we can use to turn off cylinder deactivation.

So, before I kick start on what’s on the table. Let’s see how cylinder deactivation works. And why the steps to turn off cylinder deactivation isn’t straightforward.

Cylinder deactivation in different car models comes with different names.

You can see such names listed below and what they stand for.


How does turning off cylinder deactivation work?

Cylinder deactivation is often called by its acronym, AFM/MDS/VCM. The turn-off cylinder deactivation works by using half of your car’s engine cylinders to operate. This will reduce the fuel consumption rate. And your car’s engine performance will not be strategically affected.

It is necessary when your driving situation doesn’t need all the horsepower of the engine. The turn-off cylinder deactivation will have the engine run on half cylinders. Thereby using minimum engine power to run the car. So, when you want to speed up or climb a hill. The engine will transit and make use of all the cylinders for maximum performance.

You cannot turn off cylinder deactivation with just a click of a switch on the dash. The car is built with a system that monitors the power required to run the car. When the sensor gets the signal that the car needs low power, the system will deactivate other cylinders. The cylinders are deactivated by a solenoid mechanism. It does this by shutting down its valve lifters. This goes to lower the pumping losses and reduces the amount of fuel delivered to the cylinders.

So, when some cylinders have been deactivated from receiving fuel. The fuel is then burned on half of the cylinders. Leading to fuel economy.

Can you turn off cylinder deactivation?

Most cars are built into the ECU the mechanism to detect the power required to run the car. When lesser power is required, it turns off half of the cylinder. The mechanism also transits the power of the engine from full use to half use.

So, you know now that you can turn off cylinder deactivation. But there is more to this. And you can also disable the mechanism.

You may ask why it should be disabled if it can be automatically deactivated. And it reduces fuel consumption rate. Some drivers enjoy driving with the car’s full cylinders at work. While some won’t like the sound, the car makes when on half cylinders.

For instance, a V8 engine makes pleasing sounds on four cylinders. Deactivating two cylinders will change the sound. Furthermore, running on half cylinders often is bad for your car’s engine.

Is It Possible to Turn Off Cylinder Deactivation?

You can turn off cylinder deactivation in any car model. Though, the steps are not straightforward. You will need to install the uninstaller or disable kit for your car to uninstall or disable the cylinders.

Install a delete kit To Turn Off Cylinder Deactivation.

To install a delete kit, you have to disassemble your car engine’s components. There are things to install here with other standard engine parts. We won’t encourage you to do this yourself. Get a professional mechanic to have these parts installed.

Before you install the kits on the engine parts. You must upgrade to a non-AFM/MDS/VCM camshaft. Upgrading to a non-AFM/MDS/VCM camshaft will prevent a misfire code. Now use custom tuning to turn OFF the system. You can also use a program to turn the system OFF.

Install a disabler To Turn Off Cylinder Deactivation.

You can install a disable kit through the ODM II port. To do this, connect the device having the disabled software to the ODM II port. The software can then be programmed to prevent the car’s ECU from automatically switching to a half-cylinder. You don’t have to disable any part of your engine component when programming the software.

This is another method to apply that is straightforward. The process is easy to turn off cylinder deactivation. The software will alter the program of the mechanism in charge of cylinder deactivation. And disable it from deactivating the cylinders further.

This method is easier to go through than the kit installation involving engine components being loosed.

Does turning off cylinder deactivation help?

It is very helpful as it elongates your car engine’s life. Your car will work as normal and won’t experience short power when some cylinders are turned off.

Disadvantages of cylinder deactivation are:

  • Increased fuel consumption rate.
  • Your engine will often misfire.
  • You will hear noise from the engine compact area.
  • Your car will stutter when it tries to engage or disengage the system.

GM motors issued a public service bulletin last year, 2021. The bulletin focused on their vehicles of 2020 and 2021 make that experienced a collapsed lifter. The filter is an important aspect of the cylinder deactivation system.

Most GM cars affected are the GMC Yukon, Chevrolet Silverado 1500, Chevrolet Tahoe, GMC Sierra 1500, Cadillac Escalade, and Chevrolet Suburban.

If you turn off cylinder deactivation, it won’t reduce the fuel consumption rate.

Does cylinder deactivation affect engine life?

When you deactivate the car cylinder, it will have some impact on your car’s engine life. But most recent car models are built to withstand the switching of cylinders. Though, these models can’t withstand this for a long while. But the engine will still be affected in long run. Perfection is yet to be attained.

Running your car on a half-cylinder will create hydraulic gaps in the engine. This can cause vibration in the engine. This is because the expected energy of your engine is no longer attainable. This is so because the engine cylinders have their specific roles to play in the operations of the engine. So, when cylinder deactivation is in effect, your engine will lose balance and vibrate.

Deactivating your cylinder can also cause the common rail system to damage or break down. This will lead you to burn more fuel as the system tries to adapt to the new operating system. The deactivation of car cylinders will disable the injectors. This will go on to add pressure pulses in the common rail system. And this is bad for your car engine’s operations.

Can Cylinder Deactivation Cause Engines Wear out Faster?

Yes, deactivating half of your car cylinders will cause the engine to wear out early. When your car’s engine cylinders are deactivated. It leads to more workload on the generation of torque on other cylinders.

Oil Pressure Gauge Go Up And Down While Driving

The longer you drive with half-cylinders, the more your engine wears out.

How much can cylinder deactivation increase efficiency?

The cylinder deactivation mechanism works on certain scenarios that trigger its activation. So, it can be triggered by the sensor signaling that the car needs more power. Or that the car needs to run on lower power. So, when the mechanism notices the car doesn’t need much power. It will deactivate half of the cylinders. This will also lead to fuel economy.

How do I bypass cylinder deactivation?

It is difficult to turn off cylinder deactivation with a click of a switch on the dash. Therefore, you will need to bypass cylinder deactivation by installing the disabled software to the ECU. You will use this software to alter the program of the cylinder deactivation mechanism.

How does cylinder deactivation cause engines to wear out faster?

Just like every other mechanical component. They’re meant to operate on certain specified conditions. So, when these conditions are altered, they will malfunction. When the cylinder deactivation is enabled, some components of the engine will minimize operation. This will cause a load on the engine and force it to operate beyond specification.

Now, the most used cylinders will get weak quicker and wear out. Though, it doesn’t wear out outrightly. But with time, you will notice it.

Does cylinder deactivation help improve mpg?

Cylinder deactivation can improve your car’s MPG. Though, it is not that there will be no much improvement. But since the engine is running on half cylinders. The fuel consumption rate will reduce. But according to findings from Autosmart, the fuel drop range is from 4 to 10%.

With all the explanations above. You may inquire if it is worth it to buy a truck with a cylinder deactivation mechanism.

It may be worth it if you care about fuel economy and the driving environment of the truck. But be informed that running a car on half cylinder for too long will affect the car’s engine.

Will Disabling The AFM/MDS/VCM Void the Warranty?

A report from Range Technology. They’re involved with the production of software and kits that disable cylinder activation mechanisms. Using their product on your vehicle won’t void your car warranty. Their software is a plug-and-use application. And your car will get back to the manufacturer’s standard after the use of the software.

Meaning Of SR5 On A Toyota

But using the delete kit to deactivate the cylinder deactivation will void your car’s warranty. Because you will have to loosen some components of the engine.


Bottomline Can you turn off cylinder deactivation

Most recent car models with the cylinder deactivation mechanism. The mechanism helps reduces the fuel consumption rate of the car. And may also affect the lifespan of the engine. To turn off cylinder deactivation should be advised by your mechanic. And you should know what its effect can be.

As said in the articles, to help in a carbon-free economy, don’t turn off cylinder deactivation or disable it.

About Daves 41 Articles
David Samuel is an accountant and Tech-Savvy. He is the author of Art of Public Speaking available on Amazon KDP. Blogging is part of his hubby as he likes sharing ideas with his huge fan base on Facebook and Twitter.

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