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What type of ODBII gadget did you use? No other truck my ass .lol my 99 silverado 1500 with the junk LR4 4.8l and 320k miles 9n itgets 21mpg all day long with 93 octane gas in it. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. This is in response to pretty much everyone. I will keep reading and take notes. Only running on drivers side cylinders. We need availability of a replacement engine without the AFM. Nine plaintiffs filed the General . September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. Hello. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. Had similar problems under warranty, no telling what they rigged me up with at the dealer. Just recently, GM announced a temporary closure. Ayush Srivastava Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? Anyway that horrible experiment was in the late 70s early 80s along with those converted Diesel engines..those like the 8-6-4 nonsense were just terrible failures. They layed over night in engine oil before instalation. This system was originally used in early 1980s Cadillacs. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. 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 a 2011 GMC with over 162,000 miles on it and it runs great! HP tuners is not for someone like me that doesnt know how to use it and from what I read neither the range nor diablo plug and play device will work since the buicks pcm files are different than all other GM vehicles that came with afm because it was tuned in house at gms performance division. As it turned out one of the cam bearings was failing and causing the cam to wobble (my guess) which messed up the AFM and probably some other stuff too. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? However, they are only functional on engines that usedAFM. Dod is the biggest failure sence the 8-6-4 caddie in 1981. Chevrolet Silverado 2014-Present: Common Problems Thanks for your help. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? You mentioned that it will shoot oil into the pan and on the cylinder walls possibly causing some oil consumption So i have a running vehicle and my only concern is making it as reliable as possible, should I disable the AFM or not?? .or something similar . Don't even get me started on the shortened life of the cooling, starting and charging systems. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! No problems with any to this point. The vehicles affected were 2007 to Feb. 2011 AFM equipped engines (Aluminum or Iron block-L94, LZ1, L99, LC9, LH6, L76, LFA, LMG, and LY5). Because I want to. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. 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? 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. [] engines is that when VVT (variable valve timing) appeared and was later followed by AFM (which is Active Fuel Management, when the engine deletes four cylinders under light load) both of these packages drastically affect []. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes All eight cylinders are now powering the engine. Now Im here tring to figure out what to do. GM get a clue! It depends on the failure mode of the lifter however, certainly worth a try. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. Unfortunately, I found out about the lifters too late. Covers me to 100K. Can you tell me what needs to be done with the VVT? in your opinion will this work, i really dont see any reason it wouldnt. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. 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. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. I cant really tell from driving. Thanks. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. Thank you again for the response. Better airflow reduces drag on the pistons and the associated pumping losses. Cylinder misfires (most common sign) Rough idling, poor acceleration, loss of power Check engine light with engine misfire codes Air-to-fuel ratios are either running rich or lean The easiest way to tell that you have an injector problem is through the check engine light and engine codes for misfires. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . Pulled right valve cover an rockers on syl 6 dont move. That might show up if you cut the filter and looked for debris in the pleats. It has plenty of oil pressure and I put all new lifters in it. I just did the delete and replaced the cam as well. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. 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? Another General Motors 5.3L V8 Lawsuit Filed | GM Authority 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. Your email address will not be published. I loved this rtuck until this happened!! I had privilege to work on some of that garbage they never did work . These trucks cost too much to have a terrible product. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. I know I felt the same way. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? When you don't need the full power of the engine, it provides better fuel economy." She started to have the lifter problem again after 60,000 miles more. But it also restricts passages that the oil runs through. Also, it is the easiest way [], [] for the 2010 Chevy Camaro SSis also a Gen IV 6.2L aluminum-block V8, but with the addition of Active Fuel Management and Variable Valve Timing. Im crossing my fingers it does the trick! PDF GM LS AFM Deactivation Lifter Issues - Melling One alternative is to swap in one of the larger 6.0 non-AFM truck cams. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? 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. A 14 gmc 5.3 Sierra 85000 miles You can unplug the sensor on the vacuum booster and it will fool the computer into thinking there is a high demand on the engine and shut down the AFM system but you will have a Check engine light in your face for doing so . 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? Hi Grant is that disabler still working for you ? I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? You will be placed in derate if the ECM does not see the correct resistance from the ATF intake. Teflon coatings does not last. Will the plug in deactivater fix the oil consumption or will it cause more consumption? I have read synthetic isnt good for AFM lifters. Love the truck so far. module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. TheAFMsystem can be identified by its components. Required fields are marked *. Engine oil pressure is fine. Given that, would you recommend buying one of the OBD-II devices to disable AFM? Here are a few of the issues that you'll want to keep on your radar if you drive a 2017 Chevy or GMC vehicle with a 5.3L engine in it. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. I just took a long trip and it used 1.5 quarts of oil. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. Then I guess I have to spend a bunch of money and get the delete kit. The oil-pressure controlled system that operates the special lifters is VERY prone to failure, if the oil is not changed on time, OR if the wrong oil is used. But after reading this thread, Im a little concerned about the long-term reliability. [] they have a downside? Gary, [] 3 engines didnt have AFM (Active Fuel Management) or VVT (Variable Valve Timing), so you dont have the expense of an AFM or VVT delete []. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? chevrolet - How does cylinder deactivation work? - Motor Vehicle Having it fixed now, just curious Seems like a problematic design. So I did the job one more time. Please report back if you have any issues, but I think you are in good shape. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. AFM - active fuel management strategy which deactivates the lifters on specific . PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Fuel pump failure is the most common problem and can occur due to a number of reasons, such as a clogged filter or a faulty pump. 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. . Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. They have plastic casing, so you can imagine what will happen with aged plastic. what deleter (if thats a real word) have you heard good things about. lol. Can I (should I) also change to a standard volume oil pump? It came back on last Wednesday starting with a flash. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? The oil collapses the plunger inside the lifter. GM claims fuel improvements ranging from 5%-15% depending on the engine. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. The GM 2.7-liter L3B Turbo four-cylinder engine for Chevy Silverado and GMC Sierra pickups is meant to change minds about power and torque in a small package. I havent has any lifter or cam issues. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. Toyota will be my next truck unless GM owns up and makes wright with consumers. Thank you for your time. Thats a tough call, if the warranty will cover itId let it run out. Problems After AFM Delete And How to Solve Them? - Tools Bible Thanks. Whats the next step? I tried the trans fluid in the oil. The most common issue GM vehicle owners with AFM report is increased fuel consumption. hi brian when you replace the lifters do you have to change the guides also? 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. Friend will send to me from Arizona. . When you eliminate the AFM system, the extra oil is no longer needed. The system uses solenoids to deliver oil pressure to control. Changing the sensor didnt help. When you drain the oil at three to four thousand miles its still clean. Fortunately I received a reducing in house shop hourly rate. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. Help appreciated. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . 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. Have there been improvements in more recent model years employing AFM [2014 or newer]? Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. An electromechanical system deactivates and reactivates all 16 of the engine's hydraulic valve lifters, controlling valve actuation. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. Diablo says yes but they do not provide tunes. Excess oil will be pushed out of the pressure relief valve into the oil pan. New plugs and wires. I wear hearing aids, but I thought I heard more engine noises, but after checking the gas cap, the light went out for a week. This reduces expense when you build it [], [] intake, and a cable-driven throttle body, plus Im also installing Trick Flows VVT and AFM delete kits. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. A 14 gmc 5.3 Sierra 85000 miles Welcome to socialism folks . Wed recommend a call to our partners at Summit Racing. For fun, he runs his 427-powered C5 Z06 in ECTA land-speed racing, at OPTIMA street car events, and at a mix of autocross, drag racing, and track days. What type of disabler did you go with? Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. I ordered a electronic disabler for it today. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations.
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