WebMay 13, 2024 · When cylinders are deactivated, the engine uses less fuel, but simply "turning off" the ignition source for the cylinders in question is only one of the operations that has to occur; the valves ... WebOlder systems can also wear out and become unreliable over time. There are devices available that override your computer to disable the AFM/DOD system, but if it’s really getting in your way, just delete it! Summit Racing Equipment carries cylinder deactivation delete combos that include all the parts you need to do the job, including a ...
Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2024
WebOct 30, 2014 · Cylinder Deactivation (Active Fuel Management) System Description To provide maximum fuel economy under light load driving conditions, the engine control … WebDec 15, 2024 · AFM is primarily a fuel savings added feature, not a pure emissions device that cannot be legally removed like a cat. AFM is only turned on in some cruising, low load situations. GM made LS V8's with and without AFM that both had no issues meeting goverment mandated emissions standards. This is a grey area. geo image services pty ltd
The Hit and Miss Nature of Cylinder Deactivation Systems
WebActive Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that shuts down half of the engine’s cylinders in light driving conditions to improve ... WebDFM – dynamic fuel management which can deactivate the lifter on any cylinder at any time. Unlike AFM, this can result any many different types of firing patterns, some of which are fixed patterns (like ¼, ½, ¾) and others which are rotating (like 1/5, 1/3, 2/5, 2/3). This is only available on small block engines (L84 and L87). WebThe AFM oil pressure relief valve regulates the oil supplied to the VLOM and is located in the oil pan near the oil filter housing. The AFM system has an operating range from 27 PSI to 66 PSI of oil pressure. At higher engine speeds the high side of this operating range is controlled by the AFM oil pressure relief valve. chrissies sea isle city