It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. My question is: do I install the electronic disabler on the new engine to avoid future issues? Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. I am wondering the same thing. Most will want to get rid of the AFM immediately and VVT isnt for []. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. RANGE TECNOLOGY.COM. Thank you again for the response. whith a disabler. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. Please report back if you have any issues, but I think you are in good shape. The car runs great apart from the shuddering at those speeds. I always have done my oil changes on time, not sure about the people who owned it before me though. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. Ever since that which was Feb/March 2020 i get a intermittent rattle does not do it all the time and I am not getting any codes i.e. Cylinder deactivation works to save fuel, but it may not be for the reasons you think. 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? All these comments on the 5.3 are blowing my mind!!!. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. AFMlifters have a history of failing and oil consumption can be a problem. There are so many moving components in an engine these days as opposed to the past. I have a 2007 Yukon XL with the 5.3L and am planning to do this as my lifters have failed and it rattles loudly if it starts, and runs limp. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. Have there been improvements in more recent model years employing AFM [2014 or newer]? Ketil, let us know what you find out. 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. 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? The engine will switch to operating on fewer cylinders when cruising at a constant speed. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Very confusing stuff out there. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. I have had some say that it is the valves and others say that it is the cats plugged. The Tundra fares better but the frame has the rigidity of wet spaghetti and the 5.7 has had problems with VVT solenoids and the plastic timing chain tensioners. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. 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? There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. 2011 Chevy Avalanche LTZ. Hopefully he can free up the stuck/collapsed lifter. 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. AFM - active fuel management strategy which deactivates the lifters on specific . Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. also in the pan is another AFM oil filter near the external engine oil filter. The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. [], [] as the LS engine familys hybrid engine in trucks and SUVs. I dont know where to being to look for the problem. The original version sprayed oil on the cylinder walls and increased oil consumption. I would say maybe 5% of my customers keep up on their oil changes. Here's what you need to know: 1. However I do have 7 year bumper to bumper warranty that covers this problem if I start to get lifter problems over the next 2 years.. On the other hand if get the AFM disabler installed I am pretty sure that I void the warranty from what I read on the policy. There is a good chance that some of the drivers side lifters decided to go. Love the truck. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . An electromechanical system deactivates and reactivates all 16 of the engine's hydraulic valve lifters, controlling valve actuation. This really sucks. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. has 92,000 miles and was just told I have cam and lifter failure. 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? Given that, would you recommend buying one of the OBD-II devices to disable AFM? According to some experts, switching to cylinder deactivation reduces the emissions high somewhere between 4 and 10%, which is a huge percentage of saving the air from pollution. Cylinder Deactivation to the Rescue. With the nipple, or without? This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. Was thinking maybe I could trick the ruck into thinking the engine was not warmed up, however, this might cause some problems for other processes, such as mix ratio and timing. [] 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 []. Thanks. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. 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. Told her that it would not last and that she needed to find a different way to get around. When an engine is contstantly running on oil that is broken down, it not only wheres out components because of no protection. It's been an issue for a while but I've been getting past it by turning the key only to the off position instead of all the way back to "lock". A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. The engine has flex-fuel capability. []. How about if they just let us have a manual transmission agains for fuel mileage? It seems to me that the high volume oil pump should not hopefully cause premature wear but if it is pushing more oil through the heads than I guess the valve stem seals have more work to do. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. Regarding the cylinder deactivation impact on fuel consumption . I am hoping this does the trick. If you ignore it and keep driving, odds are you will destroy the cam as well. I wont bother with blocking the relief valve. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). Its a CA EMMISIONS TRUCK. A tuner can often fix that as well by giving it some more ignition advance in these regions. 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. Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. Yeh truck has 5237 miles on it I also notice that it doesnt go into V4 when it is cold. As a side note, the early ones had a 24x reluctor and plastic chain guide (good) vs. the later ones with 58x and the spring loaded tensioner (not so good). I only had 81k on the motor. Our 2013 yukon with 47k miles just failed. 2014 Chevy, GMC Pickups Recalled For Cylinder-Deactivation Issue I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Truck ran fine before that. Where can I buy a bolt to replace this relief valve ?? My 5.3 is. Thanks. I drive the same 320 mile trip every two weeks and drive the same route and full tank. The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit what deleter (if thats a real word) have you heard good things about. Then had to drive the truck back to Tampa from Cheifland Fl. GM claims fuel improvements ranging from 5%-15% depending on the engine. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Im praying that my RangeTech buys me a few years. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. Double digit MPGs in my 98 K1500 would be a dream lmao. Fortunately I received a reducing in house shop hourly rate. Theyre also notorious for bad cam tower oil leaks. 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. There is no light on my dash or anything that indicates the system is active or exists, so its very confusing, Im still not sure if my vehicle has it or not. Thats not all bad because it saves the cost of an AFM delete kit. Cylinder Deactivation: What Is It and How Does It Help Save Fuel? I have a noise in the engine but it seems to go away when revved up. There is a chance the cam lobe was stressed and started to deteriorate. Will the plug in deactivater fix the oil consumption or will it cause more consumption? I got a 09 Chevy Ive had the 1 go out then the 7 about 2 weeks apart if I known what I know now I wouldve changed them all at once but now I have a misfire on cyl 4 but it came back in why are these lifters going out one at a time like this the 1st two that went out I was coming off the interstate an stabiltrack came on now the 4 misfired twice both times pullling out my driveway. Thanks. Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . The motor I pulled was a 2007 LY5 with about 77k on it. 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. Replacing engine due to issues caused by AFM. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. Chevrolet 5.3 Engine Issues and Recommendations Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. GM uses 3 different styles all are engine specific. Since the tranny oil worked, you should now change the oil, right? I know a few guys with Tundras. Is this the shield you referred to in a past post? The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). There is a note in the TSB that states the bulletin doesnt apply to the LH6 used in the Rainier, Trailblazer, and Envoy due to a different design oil pan and AFM relief valve. Fouls those plugs. I ran 0W-20 no more the 5000 miles between changes. I have only put about 600 miles on it and noticed that the oil was a bit low and am hoping that it was that way when I picked it up. Replaced all lifters on passenger side as well as pushrods for even wear. Any advice that you could offer would be great. I ave noticed the point about excess oil spray. Having it fixed now, just curious Seems like a problematic design. Hopefully more is known by then. Brian, I have the same question as Scott. Given maximum engine power is not required during the majority of everyday driving, AFM works to deactivate engine cylinders when they are not needed, such as when cruising on the highway, thus. I would. Having a hard time finding one .. In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. Been driving with no issues but I did notice that the AFM disabler removed a P0449 code (Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction) dont know if this is a coincidence or they are related??? The trucks are only supposed to use two four. I have also heard that the oil pump is to be changed and I have also heard that it does not matter. Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. He used seafoam and changed to synthetic oil. Oil 0w or 5w -20 The oil is baked on to every component. Why does GM's cylinder deactivation cause lifter failure? The wife however found this deal on an Envoy Denali . Replaced all 16 lifters due to collapsed lifter on CYl #4. Deactivating cylinders at light load forces the throttle valve be opened more fully to create constant power, and allows the engine to breathe easier. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. Cant believe they havent fixed this in a decade. Some guys have been able to use a tool through the top with the cover off to get it to release. I will be installing the AFM deactivator tonight when I get hoe. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. Toyota has their own problems. There are 5.3 cylinder deactivation problems that can occur. Teflon coatings does not last. "The idea behind cylinder deactivation is that when you're cruising down the freeway and there's low load, the engine can turn off half the cylinders and in theory burn half as much gas. Now Im here tring to figure out what to do. On one hand it has an aluminum block, which is nice. We did take it apart to check for metal possibly being trapped inside, it looked like brand new. Help appreciated. The 2016+ Tacomas are junk. No movement on the rocker arms. These trucks cost too much to have a terrible product. After reading these forums Im a little concerned about my decision to stay with GM. It seems this tough engine has everything incorporated into it. Dale, I have a 08 Tahoe thats doing the same thing.Any info you have on this would be appreciated, [] Do they have a downside? GM Active Fuel Management Cylinder Deactivation Technology - GM Authority Chevy 5.3 Engine Problems Are They That Long-Lasting? - Motor Verso The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. That inherently less smooth operation requires additional NVH dampening. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . GM 6.2 Active Fuel Management Problems: What They Are and How - CarAraC Install an AFM Delete Kit Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. It replaces the AFM components with standard parts. Plugs spark fine engine has power at higher RPMs although it is still in Limp mode / stabilitrack message, even after driving it a few times above 60 MPH then clearing errors with handheld programmer. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. 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. Lost number four Some drivers want V8 power under their foot at all times. December 20, 2021 A GM lifter recall should allegedly be ordered for Buick, Cadillac, Chevrolet and GMC vehicles equipped with 5.3L, 6.0L or 6.2L V8 engines. Welcome to socialism folks . Glad I did. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. Removing ignition lock cylinder when it won't turn at all AFMengines use special lifters for cylinders 1, 4, 6, and 7. Any problems to watch out for?Did you replace the VLOM? There may be an ignition related issue on that cylinder. Very expensive repair too! How to Delete or Disable Active Fuel Management (AFM) on GM Engines Would you get enough power to drive at freeway speeds? Accept i only have 60K on my truck and it hasnt recovered. I have the towing package on my 13 Tahoe LTZ. The biggest problem is nobody changes their oil on time. I just bought a 2018 Silverado. [] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. Yes thats true. Keith, were happy to help. Getting ready to diy for $450. (Non-AFM engines have a smooth cover.). They lasted one year with big problems. After all we bailed them out of bankruptcy. As the problem gets worse, youll hear a lifter tick and eventually you may see clearance between the pushrod and the rocker which will quickly destroy the cam. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. My fear now is not will it happen but when! This is in response to pretty much everyone. I am trying to find out of this is true. i just bought a 2018 Silverado with the 5.3 Thankfull for any ideeas! They dont so any better than domestics on mpgs. [] 5.3L engines start in the $600-$1,000 range and go up to a little more than $2,000 for the 6.0L and 6.2L engines. The result is improved combustion chamber pressure as the piston approaches top . Another General Motors 5.3L V8 Lawsuit Filed | GM Authority Required fields are marked *. Problems After AFM Delete And How to Solve Them? - Tools Bible If you just crack it without it starting it moves all the time . The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. 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. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. It actavated the lifter? Replaced all lifters. Seems my oil pressure sensor is bad, are showing the same oil pressure at all times, even when it dosnt run.Dont know it that fault was there before i replaced the lifters. Traded it with 180K miles and did not experience any problems. 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. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. This is what I keep telling people. September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. 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. I have a 2011 GMC Sierra 1500 with the 5.3. Never did strand me on the side of the road way. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? 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 had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. But after reading this thread, Im a little concerned about the long-term reliability. If I put the Range module on, is that all I need to do, both now and long term? NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. The system uses solenoids to deliver oil pressure to control. 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. Its not possible to install them wrong?
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