gm cylinder deactivation problems

This is in response to pretty much everyone. . Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). We recently purchased an 08 Suburban and noticed some shuddering around crusing speeds, usually 45-55mph and highway speeds around 75mph. Are there errors or something only the dealer can clear? Everything was fine for two weeks, ow customer complains s it same noise it made as before. I am leaning heavily on installing the AFM disabler. My 5.3 has a vin code of O. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. I have an 07 Yukon with 230k on the engine. I have the towing package on my 13 Tahoe LTZ. I have 1999 5.3 Silverado that gets 19-20 miles to the gallon all the time this shit pile with dod only gets 14 miles to the gallon. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. Brian, we have a 2007 Yukon Denali in our shop with a 6.2L v-8 that has suffered a lifter failure with camshaft damage. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. But after reading this thread, Im a little concerned about the long-term reliability. Im crossing my fingers it does the trick! of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). Still have no power. Changing the sensor didnt help. If the lifter actually fails so that the mechanism wont release, it wont work. This new lawsuit is essentially identical to the previous. Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. I had a 2007 Yukon XL 5.3 with the AFM. Because your Saab is mechanically similar to the Trailblazer, wed suggest that you are correct and no changes need to be made to the relief valve. Some drivers want V8 power under their foot at all times. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. But if you dont like it. When you eliminate the AFM system, the extra oil is no longer needed. Just shut AFM off. I had to replace them all and the camshaft as well. Or not because it is the cast iron block and not he aluminum block? The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. Engine oil pressure is fine. If buying a tuner/chip which works best for that truck/engine? From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. I wont bother with blocking the relief valve. I recently took a long trip and it burned 1.5 quarts of oil. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. Better airflow reduces drag on the pistons and the associated pumping losses. GM Active Fuel Management Cylinder Deactivation Technology - GM Authority Toyota has their own problems. With 44, its a enormous Jon to remove the oil pan. Hi my name is noel I am a mobile mechanic and I have a client that was having trouble with the lifters on a 2011 gmc yukon Denali 6.2 I placed the lifters after finishing I still had a problem with cylinder 8,6,3 rocker arms were not moving so I replaced the cam OEM part but still having miss fire on cylinder 6 what should I do to get rid of this problem, [] computer cannot switch over to four-cylinder mode. Perhaps a flaw by design would be a more appropriate description . Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy the extra oil isnt needed. One the other hand, it came without AFM, VVT, or flex fuel capability. No problems with any to this point. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. I ave noticed the point about excess oil spray. While it does still use the GM Active Fuel Management cylinder deactivation technology that caused a plethora of issues on the gen-four Vortec 5300 engines, it seems that GM has solved the issues related to excessive oil consumption. Any problems to watch out for?Did you replace the VLOM? 2012 5.3 Tahoe AFM, #4 lifter collapse,replaced all lifters,started engine ran ok, then rough, got #6 misfire code. In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. [] Here is a guide on how to turn off AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Guide to disabling AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Here is an article on how to deactivate AFM. 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. My dad ended up running seafoam through it and some transmission fluid, changed the oil pressure sensor which I definitely think was bad and also cleaned out the little screen and he said it was so full of junk and metal scraps. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. It was well researched and tested back in the late seventies and eighties . But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. A 14 gmc 5.3 Sierra 85000 miles GM offers the following diagnostic steps in determining if this is the problem. I guess they also went to aluminum blocks in 2007, not sure if that has anything to do with this issues thanks for the advice! I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. Next day, fired it up to take the the junk yard and it ran great. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. 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! Don't even get me started on the shortened life of the cooling, starting and charging systems. Help appreciated. 1. . But then she passed away from cancer. What if I was able to trick the computer into thinking it is in 5th gear when it is actually in 6th? RANGE TECNOLOGY.COM. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. Ive heard the Brand name Range thrown around in other forums, This is how mine started outthen 6 months later on the highway the service stabilitrak light and flashing engine light came on. Because I want to. Had similar problems under warranty, no telling what they rigged me up with at the dealer. Problems regarding Chevy 5.3L engines ticking noise and misfire. thanks brian love the info Im thinking of buying a ford now, I am going to buy a new truck in about a month it would be a Chevy but Dodge has lifter problems so they are out and Chevy has DoD problem.If they come out with Silverado without the DoD then i would buy one.But they arent so i will become a Ford man from now on, Have fun with that Ecobust motor & stretched timing chain . 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. Seafoam with syn oil change only fixed for a week. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. will feel like a jerk asking the clerk at lowes to cut them again. It uses a M14 x 1.5 thread plug like Dorman 65217. If someone didnt want to spend gas buy a Toyota. I speak from some experience. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. I already ordered the parts to replace myself and remove the code. Ive been a Ford guy my whole life, so I was unaware of AFM until a recent trip where I did a lot of highway driving and happened to bring up the real-time mpg display, where I saw it switch between V6 and V4. 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 write up confuses me. Pulled the inntake and replaced valleypan With all the solenoids. 2014 Chevy, GMC Pickups Recalled For Cylinder-Deactivation Issue Service manager said nothing else needs to be replaced because the engine has a Teflon coating. It does seem that when they start goingthey go quickly. I have been assuming this is just a slow to pump-up lifter or lifters. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. Just pulled it down in the garage there was no other damage , luckily. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. How to Delete or Disable Active Fuel Management (AFM) I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? It also has an electrical connector on the back. I love the car so far. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. Fouls those plugs. Hopefully more is known by then. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. AFM - active fuel management strategy which deactivates the lifters on specific . Unfortunately, I found out about the lifters too late. I got the AMF disabler anyway and so far so good. Now i have my mechanic trying to follow a YouTube video I saw with a guy and a rod and a hammer. Install an AFM Delete Kit The Jury is still out on the Gen. 5s but the warranty could be an issue. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . 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. I always have done my oil changes on time, not sure about the people who owned it before me though. The motor I pulled was a 2007 LY5 with about 77k on it. Verified over hundreds of trips, makes no sense. Pod. I have a 07 Yukon with 180K and no issues what so ever. GM should recall every vehicle with this terrible design flaw! Yes, always change all the lifters at once. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. Constant engine and transmission problems. You will get codes thrown if the afm is physically removed without telling the ECM you did so. Its a CA EMMISIONS TRUCK. I am trying to find out of this is true. The dealer in Rockhill, SC when asked only said they had not had a problem. 2018 new truck has me really disgusted If I had checked this out better, there would have been one less POS Chevy sold last year ! Hello. I have a 2013 1500 with the LC9. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). What type of disabler did you go with? It has plenty of oil pressure and I put all new lifters in it. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. 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. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Problems After AFM Delete And How to Solve Them? - Tools Bible A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. [], [] LS Tech: How to Delete VVT or DisableAFM []. 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. There are so many moving components in an engine these days as opposed to the past. 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. How to Deactivate AFM, DFM, MDS, and Start/Stop To Prevent - Holley You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. My daughters car had about 230,000 miles when she complained of the problem. []. With 40000 I told her to never pull the gadget out. Is this due to the AFM being shut off? . My 2013 LC9 just had #6 lifter fail, got a misfire code but the ticking gave it away. Also putting in a new transmission vs. rebuilding. Any thoughts or suggestions would be appreciated. Active Fuel Management - Wikipedia they are known to become plugged. I couldnt agree with you less, yet I respect your opinions. Where can I buy a bolt to replace this relief valve ?? 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. Having a hard time finding one .. The valve itself is part number W0133-2574213. 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. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. I have a 12 with 4.8 Silverado 75000 miles lol. 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. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. Installed them again, all facing upwards, will know tomorrow if that was the solution.If this is the cause i cant beleve why they arnt build so that it is impossible to install them the wrong way in the plastic holder.And altso that there was no warning or installation advice With the New lifters.If these are the only lifters in the Whole world that must be in Cylinder deactivation | GM Truck Club Forum 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. changed oil , its all working now, but want to disable this sorry system. I read something the other day which I found to be funny. 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. It has the orings in place, that seals the towers. Are you saying that I am in the clear by a year and issues fixed? That inherently less smooth operation requires additional NVH dampening. Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. Ive been reading, with disgust and concern of the lifter/cam situation. Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. I have a 2011 GMC with over 162,000 miles on it and it runs great! But it also restricts passages that the oil runs through. 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. Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. Is the Pressure relief valve replaceable? I am having that done today on my 08 Suburban and its only costing me $225. Now I get 24 to 26 with deactivation locked out and full power. If you want to delete it entirely, its a M14 x 1.5 pipe plug or you could use the Improved Racing plug p/n IRP-814-M14-Kit. [], [] rugged iron block 6.0L came with VVT, but without Active Fuel Management, which saves you the cost of an AFM delete [], [] The LH6 engine is a 5.3L Gen. IV aluminum engine that replaced the LM4 in 2005. 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? 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. When a deactivated cylinder is reactivated, the control system opens the exhaust valve first to evacuate the trapped exhaust gas, before reactivating the intake valve to allow reactivated cylinders to revert to the normal operation of the compression/combustion exhaust/intake cycle. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. A 17 with 5.3. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? 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. Then changed the oil. 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. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? 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. Never did strand me on the side of the road way. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). What type of ODBII gadget did you use? 2011 Chevy Avalanche LTZ. Took the heads off again. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] Any advice that you could offer would be great. bought at Brian Tooley Racing ! If so what would the vin code be? An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. 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. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes i have a 2007 suburban 6.0 and the number 4 intake lifter took a dive.i have already started to disassemble the engine as i plan on replacing all the lifters and reassemble the engine as i never had any other problems with it. Run it and let it soak overnight. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. 2 15 with 5.3 Sierras both with 100k and It replaces the AFM components with standard parts. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. Replacing engine due to issues caused by AFM. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. There are a few potential causes for Chevy cylinder deactivation problems, including oil consumption problems, harmful to the environment, sludge issues, and lower cylinder temperatures. I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. in your opinion will this work, i really dont see any reason it wouldnt. There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. 2 15 with 5.3 Sierras both with 100k and Junk . We chickened out though and just bolted the AFM solenoid plate onto the used engine. But the problem at that time was the computer technology. Brian, 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? In four-cylinder mode, they act like air springs and allow for smooth operation. Told her that it would not last and that she needed to find a different way to get around. Chevrolet 5.3 Engine Issues and Recommendations I have 4 GMCs in my driveway right now only one with AFM its always popping DTCs, 06 Yukon (not AFM)never had a light in 12 years! Definitely dont want to do anything to fix one problem and create another. It will show up as a misfire code in a cylinders 1,4,6, or 7. Why would GM ever produce such problems with such little to gain. 50,000 miles. Once the failure has occurred, the AFM shut off methods other than that probably wont work. The wife however found this deal on an Envoy Denali . I have an 07 Yukon with over 180K. I sold them when they were new. We need availability of a replacement engine without the AFM. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. 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. If I put the Range module on, is that all I need to do, both now and long term? Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? There are 5.3 cylinder deactivation problems that can occur. Oil flows to the special lifters through theAFMtowers. This is my project car and will be my drive (about 5000 miles a year). PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 Would never take it on a long trip. 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. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. They are taller and have special oil holes. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. 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? Just one. Dod is the biggest failure sence the 8-6-4 caddie in 1981. It is also known as Displacement on Demand (DoD) or cylinder deactivation. 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 contacted service manager in Gastonia, NC and he was kind enough to tell me the whole history of the problem.. EPA required better fuel mileage and less emissions and GM, Ford and Honda(V-6) came up with this failed AFM system. What makes you think it was a design flaw ? It depends on the failure mode of the lifter however, certainly worth a try.

What Is Dad City's Real Name, Window Stickers For Trucks, Crystal Rodriguez Attorney, Texas Cdl Pre Trip Practice Test, Tom Smothers Obituary, Articles G