Most popular

Should I delete AFM?

Should I delete AFM?

An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. It replaces the AFM components with standard parts. When installing an AFM delete kit: You MUST upgrade to a non-AFM camshaft because the cam lobes in the four AFM cylinders are ground differently.

How to delete or disable Active Fuel Management?

How to Delete or Disable Active Fuel Management (AFM) on GM Engines. 1 1. Install an AFM Delete Kit. An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. It replaces the AFM 2 2. Install an AFM Disabler. 3 1. Valley Cover. 4 2. Engine Block. 5 3. Lifters.

How does the Active Fuel Management circuit work?

How the Active Fuel Management oil circuit works A valve lifter oil manifold assembly is bolted to the top of the engine block beneath the intake manifold. The oil manifold consists of 4 solenoids that are closed until activated by the ECM. Each solenoid allows pressurized oil to flow to the AFM valve lifters.

Where is the oil filter in Active Fuel Management?

To help control contamination within the active fuel management hydraulic system, a small replaceable oil filter is located in the valve lifter oil manifold oil inlet passage. The oil pressure sensor monitors engine oil pressure and provides information to the ECM.

How does GM AFM work?

The AFM system, or Active Fuel Management system, is used to limit the power of a GM 6-cylinder or 8-cylinder engine and help increase its fuel economy. The system itself is activated when the engine reaches certain perimeters, such as a cruising highway speed. This allows a 6-cylinder and 8-cylinder engine to run on only four cylinders.

What is an AFM disabler?

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 four-cylinder mode. It’s a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound.

How does cylinder deactivation work?

When a cylinder deactivates, the system closes its intake valves, which draw in air, and its exhaust valves, which release spent gases. It also stops injecting fuel into the cylinder. The piston still moves up and down – it has to,…

What is Active Fuel Management System?

Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. It is also known as Displacement on Demand (DoD) or cylinder deactivation.

Author Image
Ruth Doyle