GM uses 3 different styles all are engine specific. NOT GOOD!! How stupid do you have to be to whine like a welfare check cashing idiot when there are literally 3 or 4 different ways to totally disable AFM. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . $8500.00 fix. The problem:. The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active and Dynamic Fuel Management systems from dropping cylinders. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] . Cylinder Deactivation (Active Fuel Management) General Motors Active Fuel Management engine control system has the ability, under certain light load driving conditions, to provide maximum fuel economy by deactivating 4 of the engines 8 cylinders. How is that an improvement. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. This allows the engine to run in V8 mode. Battery was unplugged for a week.. This basically deactivates the cylinder deactivation system. I speak from some experience. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. I can literally drive from Seattle to Redding CA on one tank. 2012 5.3 Tahoe AFM, #4 lifter collapse,replaced all lifters,started engine ran ok, then rough, got #6 misfire code. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. Both #6 lifters only move when turning engine by hand, if you use the starter they stop moving. Perhaps a flaw by design would be a more appropriate description . How do you know if the lifter has failed? In other words, the crankshaft and bearings were not visible. I will keep reading and take notes. I have seen more internal engine failures in the last 5 years or so than I have in the first 15 years in the business. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. It was well researched and tested back in the late seventies and eighties . I wouldnt trade my 2000 Silverado, 5.3 liter that has constantly gotten 20 mpg since I bought it 15 years ago, for a dozen of these new $50,000 POS. All Cylinders. They layed over night in engine oil before instalation. We were getting a code that the cam position sensor was not functioning properly. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. Had similar problems under warranty, no telling what they rigged me up with at the dealer. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? Required fields are marked *. i currently get 8 mpg with the vortec 350 and a 4l60, I have a 99 Sub k1500 that i get 16 to 18 hwy loaded lightly, I get about 14 on my 95 Tahoe 2 door with 5.7 and 4l60. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). Can I (should I) also change to a standard volume oil pump? Only wish Id did my homework, nothing but issues, from 14,000 miles it starts this motor noise,as if lifters at cold starts, let set up for 8 hrs same noise, this noise is on the right side of engine, it lasts 5 seconds but never heard this until we had this cold spell in the state low temperatures or it was just time for this to start? All these comments on the 5.3 are blowing my mind!!!. I have no clue what to do now. stalled in a certain way a warning wouldn be a bad idea. There is no way cylinder deactivation and the resulting temperate decrease, with sudden piston heat expansion when all cylinders are engaged, can't have undo wear and tear on the rings, valves, piston and bore. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. 2015 SILVERADO 1500 44 crew cab with 5.3L engine: So two weeks ago with approx 70K miles, I had an odd noise when accelerating and then engine light flashing and riding rough. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). I didnt have lifters fail, I had the 4 cylinders 1,4,6,7 have such blow by that my choice was a valve and piston job or a new motor. any help? I am confused about the plug in disabler. Constant engine and transmission problems. .IMHO . Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. Delete the AFM, buy a tuner/chip, take it to a performance place and get an actual tune done that fixes it, replace the AFM lifters with non AFM type, change other engine components with thisetc..etc..etc??? [], [] LS Tech: How to Delete VVT or DisableAFM []. No clue what to do. Thank you again for the response. The only solution is to replace the entire cylinder head. Chris, when you did your delete, did you also change the cam at the same time? Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? Double digit MPGs in my 98 K1500 would be a dream lmao. If possible, will simply not using VVT provide a powerful,good running engine? Have there been improvements in more recent model years employing AFM [2014 or newer]? My Wifes 17 Buick with afm was my attempt to get back to gm. Logic says that it should not as the ECM isnt programmed to use AFM, but will it see a lack of resistance from no solenoid pack plugged in? The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. [] cherry on top is that it isnt saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. Glad I did. The market for nonhybrid gasoline-powered vehicles is expected to fall by 20 percent during that time, but with tech like smarter cylinder deactivationin these upcoming GM V-8 trucks, for . The engine was not Flex Fuel (E85) capable and did not use Variable Valve Timing (VVT) [], [] TheL76like its LS2 siblingis a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks. Wow, thanks for the wisdom,, i checked my VIN Code (position #8, M=LH6) and my 2005 Saab 9-7x does have the LH6 motor with iron block, Are you sure its only 2007 & newer motors? Easier said than done. I have a 2007 Gmc Envoy Denali with LH6 cant find a good LH6 engine but I found a 2011 LC9 engine w 52000 miles will everything plug up or what am I getting into? Now the problems back, I have 180k miles on it now. The Definitive Guide to LS Engine Specs and LS Engine Upgrades, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance - OnAllCylinders, LS Engine Bore & Stroke Chart - OnAllCylinders, http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc, Range Active Fuel Management Disable Device, LS9 6.2L Engine Upgrade Guide: Expert Advice for LS9 Mods to Maximize Performance - OnAllCylinders, LMG 5.3L Engine Upgrade Guide: Expert Advice for LMG Mods to Maximize Performance - OnAllCylinders, L59 5.3L Engine Upgrade Guide: Expert Advice for L59 Mods to Maximize Performance - OnAllCylinders, L76 Car Engine Upgrade Guide: Expert Advice for L76 Car Engine Mods to Maximize Performance - OnAllCylinders, LH8 5.3L Engine Upgrade Guide: Expert Advice for L20 Engine Mods to Maximize Performance - OnAllCylinders, LH6 5.3L Engine Upgrade Guide: Expert Advice for LH6 Engine Mods to Maximize Performance - OnAllCylinders, LFA 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders, LFA 6.0L Engine Upgrade Guide: Expert Advice for LFA Engine Mods to Maximize Performance - OnAllCylinders, LZ1 6.0L Engine Upgrade Guide: Expert Advice for LZ1 Engine Mods to Maximize Performance - OnAllCylinders, What the New LT2 Mid-Engine Corvette Reveals About the Future of GM LT Engines, All the Torques: How Summit Pro LS Truck Camshafts Help Truck Owners Maximize Performance, LMF 5.3L Engine Upgrade Guide: Expert Advice for LMF Mods to Maximize Performance - OnAllCylinders, L98 6.0L Engine Upgrade Guide: Expert Advice for L98 Mods to Maximize Performance, LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance - OnAllCylinders, Range AFM Disabler Reviews | Range Technology AFM Disabler 2019, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance, LM7 5.3L Engine Upgrade Guide: Expert Advice for LM7 Mods to Maximize Performance, LS4 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L76 6.0L Car Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L96 6.0L Engine Upgrade Guide: Expert Advice for L96 Mods to Maximize Performance, LC9 5.3L Engine Upgrade Guide: Expert Advice for LC9 Mods to Maximize Performance, LH6 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, LZ1 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, Chevy 4.3L Vortec Common Engine Problems - Vortec 4300 V6, https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-…, The 5 Most Common Chevy EcoTec3 5.3L Engine Problems, Chevy 6.0L Vortec Engine Problems - Common Vortec 6000 Problems, The 4 Most Common Chevy EcoTec3 6.2L Engine Problems, Gen 3 vs. Gen 4 LS Engines: How to ID Them (Video), Ask Away with Jeff Smith: Upgrades to GM LS 6.0L 4x4, LM4 5.3L Engine Upgrade Guide: Expert Advice for LM4 Mods to Maximize Performance, L33 5.3L Engine Upgrade Guide: Expert Advice for L33 Mods to Maximize Performance, Mailbag: Choosing an Engine Management System for an LS-Swapped '82 Olds Cutlass. 8000 grand for the repair mine was 1,700.00 to repair, I had a 2004 small block v8(4.8) 331,000 miles on the truck,it was the usual on the maintenance front axles,etc. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. If buying a tuner/chip which works best for that truck/engine? Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. However, they are only functional on engines that usedAFM. Seems like the AFM disabler device is working for a number of people including myself as the 5.3l AFM engine has inherent design faults. If thats the case, Summit Racing has dedicated truck cams that will increase power through the rangebottom to topbut the meat of it is in the mid-range where your engine spends the most time. I have 217,000+ on it and it never fails meever! Next day I drove my car to work and was fine but when I left work all lights came back on and terrible noise in the hood. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM.
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