Every one of these engine will have a lifter fail, this is a travesty! Traded it with 180K miles and did not experience any problems. 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. Next day, fired it up to take the the junk yard and it ran great. I recently took a long trip and it burned 1.5 quarts of oil. Where can I buy a bolt to replace this relief valve ?? If you swapped in a LS9 cam, you will find it makes good power at the very top, but its actually down from 5,000 rpm and lower where the truck spends the majority of its time. I am a long time GM fan but after reading how they messed up the 5.3 ( I had a fantastic 2003 Z72 off road) Ill look else ware for my next vehicle. Hi Brian, I told her to never pull the gadget out. Not sure what else it can be. It depends on the failure mode of the lifter however, certainly worth a try. Truck ran fine before that. Engine starts but is throwing a misfire on cyls 4,7. 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. All ready done valve job . No problems with any to this point. They shift cam lobes by sliding the cam, never actually shutting down the value but riding a different lube! But then she passed away from cancer. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! There are two ways to disable or delete Active Fuel Management on your GM or Chevy Gen IV LS or LS-based Vortec engineone is to install an AFM Disabler, and the second is to install an AFM Delete Kit. Most will want to get rid of the AFM immediately and VVT isnt for []. I am trying to prevent same issue. The older truck gets 19 mpg the newer truck with fuel management gets 14. Are there errors or something only the dealer can clear? Bought an 07 GMC Yukon 5.3 with the AFM, 87k. Thank you. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. This video covers the steps youll need to take before upgrading to a larger [], I am installing a complete delete system, just wondering what it will do if dont plug the oil pressure relief valve? I just bought a 2015 5 3 17000 miles I was thinking about eliminating the 4-cylinder if I delete it with just the programmer will it hurt my motor? [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. [], [] as the LS engine familys hybrid engine in trucks and SUVs. Learn how your comment data is processed. I would rather stay a V8 full time than deal with AFM issues in the future. AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. any help? When I first bought my newer truck with fuel management, the GM tech at the dealership told me; if I wanted the engine to live a long life keep the RPMs below 4500. GM offers the following diagnostic steps in determining if this is the problem. Love the truck so far. They have plastic casing, so you can imagine what will happen with aged plastic. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes With the nipple, or without? i just bought a 2018 Silverado with the 5.3 I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? I guess I might have to call a dealership or GM to get a definite answer on this one. Well, they move a couple of times after startup thats all.Asume its the same on syl 7 on the other side.Disconected the Connector to the solenoids, no difference. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. All the time. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. Should I buy one to disable the V4 mode? I got the AMF disabler anyway and so far so good. All eight cylinders are now powering the engine. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. We need availability of a replacement engine without the AFM. Im considering just replacing the 5.3 ( should be LMG, 2007 YUKON ) with the L96 crate engine. I was looking at the 08 escalade hybrid with dod on its 6.0 so wondering if the delete would contribute to the high oil consumption and therefore would adding the deflector be a good idea. If you are using VVT, you could use the NAL-12612273 (L92) cam. If you dont have VVT, you could use part number NAL-12561721 (LQ9) along with a 4-pole 3-bolt 2005 Corvette cam sprocket p/n NAL-12586481 to make it compatible with your ECM. I had to replace them all and the camshaft as well. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! As we were installing the sensors prior to installation in the vehicle, we noticed that there was no fitting on the oil pan for the oil level sensor. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. Now Im here tring to figure out what to do. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. I could just transfer over the AFM lifter cover, but it is really nasty on the bottom side & I do not want to risk damaging this replacement engine if it is loaded with debris from the lifter & camshaft failure. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. 50,000 miles. They dont so any better than domestics on mpgs. Some guys have been able to use a tool through the top with the cover off to get it to release. I wii be using this truck to haul a camper for full time RV living and am thinking of a tuner to shut off AFM and maximize performance and economy. My concern is if I leave the non-AFM lifter cover in place & have nothing to plug the 5 pin AFM solenoid connector into, will I get a MIL? Then changed the oil. My point is that the engine likely on uses dod a small percentage of the time so can not really imagine that the delete causes any more issue than normal which may be the high oil consumption but do all of these engines with dod consume a lot of oil? Shame this happened. She started to have the lifter problem again after 60,000 miles more. Basically rebuilt most of the engine while in the vehicle. [] they have a downside? Their tech guys have seen it all and may have some thoughts on this as well. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. Here's what you need to know: 1. NOTE:If you were in a situation where youve installed the AFM delete kit, but dont have access to a programmera disabler can still be a viable option. I read something the other day which I found to be funny. When cruising on the freeway (for example) in 4 cylinder mode and jumping on the throttle to pass or get out in the fast lane, there is CONSIDERABLE and annoying and dangerous lag, like 3 seconds, and this is a problem. One must anticipate this. The only solution is to replace the entire cylinder head. If you just crack it without it starting it moves all the time . Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. You could also have tried that if the trans oil didnt work. It is being covered under warranty since I only have 72,000 miles on it. Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? What would you do if you were in my situation? Its not GMs choice to use AFM. I loved this rtuck until this happened!! [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. I ordered a electronic disabler for it today. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. My fear now is not will it happen but when! im going to plug in a dissabler when im done to keep it V8 mode all the time. I had privilege to work on some of that garbage they never did work . If I were to put a 2006 5.3L in a 2007 Avalanche and buy the unit to plug into my OBD2 port would it work? The dealer in Rockhill, SC when asked only said they had not had a problem. I recently bought a 2018 Silverado 5.3L with AFM. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. If I put the Range module on, is that all I need to do, both now and long term? Ive read at many websites that the GMCs envoys, Chevys and saabs did start to come with AFM in 2005 with the LH6 motor,It says here it started in 2006 on the saabs, then the pick-ups got AFM in 2007. Im servicing a 2011 Chevrolet 5.3 with AFM. Regarding the cylinder deactivation impact on fuel consumption . All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. Replaced all lifters on passenger side as well as pushrods for even wear. Is the Pressure relief valve replaceable? Billy, there is some interesting trivia here on the L92. Your email address will not be published. If so what would the vin code be? When you eliminate the AFM system, the extra oil is no longer needed. []. I recently bought a low mileage 2013 Silverado and the lifters collapsed. However, the fuel savings are not always as much as expected. 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. Id wait until the warranty expires then disable. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). My 2013 LC9 just had #6 lifter fail, got a misfire code but the ticking gave it away. 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 . 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. If someone didnt want to spend gas buy a Toyota. CAM motion says no just have to disable the AFM and VVT with a stock tune as the camshaft is not an aggressive camshaft but a drop in. I just got new warranty engine and dont want this issue again? These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). Toyota has their own problems. Send response to tkrieg@cox.net. 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. General Motors has issued a service update for 2021 model year full-size truck and SUV models that are being shipped to dealerships and may be affected by valve lifter problems. I have always loved Ford and Chevys , I dont like this Vehicle not one bit, starring shaft has to be lubed or it whines, front A arms has done been replaced, tapping in motor, leaf springs has been lubed, retorqued, put completely new leaf springs back in on the rear , grease all down from rims to body of truck, you have to clean often,console shakes as if milk shakes in console which later they also put rubber bushings in front of coils of shocks ( front end) .You lock it down in 44 it s metal to metal , As of now Im at 32,000 done gone threw all the arbitrator laws depending on how it goes? Most of all, my concern is reliability. 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? Better airflow reduces drag on the pistons and the associated pumping losses. I am trying to find out of this is true. Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. A custom tune by a knowledgeable tuner with access to a chassis dyno will pay a lot of other dividends other on top of turning off afm and VVT. Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. The oil is baked on to every component. I have read synthetic isnt good for AFM lifters. Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. With the AFM tuned off, it shouldnt be trying to switch over to four cylinder mode. I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. I hate it. The engine will switch to operating on fewer cylinders when cruising at a constant speed. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. Last GM Ill ever buy unless its got a diesel. Batten, followed by several years developing performance pistons at Wiseco Piston Co. Today, Brian develops performance parts for Summit Racing Equipment and is a regular OnAllCylinders contributor. I speak from some experience. I have already dropped a lot of money on this truck (08 suburban). Hello. bought at Brian Tooley Racing ! 2 15 with 5.3 Sierras both with 100k and The LZ1 was upgraded with AFM and []. Ketil, let us know what you find out. HELP, I have 2005 envoy that runs makes lifter noise then dies in about 30 seconds then I started it one day and it ran with little noise for 5 min started next day and it starts and dies again got heads off was told I could put ls 3 lifters in is that true or is there something else I could do thanks Duane. 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. Engines with AFM use a high-volume oil pump. Thats a tough call, if the warranty will cover itId let it run out. I just took a long trip and it used 1.5 quarts of oil. Glad I did. TheAFMcylinders are opposite of one another in the firing order. I love the car so far. If you already own this engine you will need to deactivate the AFM system or even better DO NOT buy any GM vehicle with this engine. Question is, since my 2004 ECM and wiring harness were made before the AMF came about will this motor work properly as a V8 or will I need to replace the lifters, cam, oil sensor, etc as the delete method mentions? They layed over night in engine oil before instalation. It is currently at the dealer having a new long block installed under warranty. NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades.
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