gm cylinder deactivation problems gm cylinder deactivation problems

This allows the engine to run in V8 mode. Install ls3 valley cover. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? I recently took a long trip and it burned 1.5 quarts of oil. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. I just took a long trip and it used 1.5 quarts of oil. Loved the looks and interior and thought a I got a great deal at $6k even. Most of the complaints show up in the 2009 to 2011 model years. I went with the new motor for the warranty. I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. Looking forward to input from the forum, Thank you. With 40000 Double digit MPGs in my 98 K1500 would be a dream lmao. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. will feel like a jerk asking the clerk at lowes to cut them again. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? I have a 12 wit 4.8 Silverado 75000 miles Basically rebuilt most of the engine while in the vehicle. 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. please respond with your opinion. IMHO . Oil flows to the special lifters through theAFMtowers. There is a chance the cam lobe was stressed and started to deteriorate. Is Your 5.3L V8 Engine Eating Up Too Much Oil? We - GM Parts Online On one hand it has an aluminum block, which is nice. Just one or two. The only solution is to replace the entire cylinder head. Todays computers are faster so it does work. Sometimes it will do it all the time and other times can drive it for 10 miles and then it starts but doesnt do it constantly when driving. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. []. Learn how your comment data is processed. PDF GM LS AFM Deactivation Lifter Issues - Melling I plan on getting a tuner to disable the AFM. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. hi brian when you replace the lifters do you have to change the guides also? Bought an 07 GMC Yukon 5.3 with the AFM, 87k. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. This is what I keep telling people. I own a reputable repair shop. 1. 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. How did your turn out? Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly. I have a noise in the engine but it seems to go away when revved up. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority Love the truck so far. More information can be found in the GM TSB bulletin number 10-06-01-008g. it is the regulator guy! I had privilege to work on some of that garbage they never did work . The cost of just rings $4,000.00, [] Disable your Chevy AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] like front timing cover, knock sensor location, cylinder head style (cathedral ports), AFM (Active Fuel Management), and other components are key clues to which engine family youre looking []. In the mean-time I found that you can keep the engine from going into 4 cyl mode by using the manual shift (if so equipped) and keeping it out of 6th gear. 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. Will the plug in deactivater fix the oil consumption or will it cause more consumption? All Gen IV engine blocks haveAFMtowers and oil passages cast in. It depends on the failure mode of the lifter however, certainly worth a try. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. Thankfull for any ideeas! In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. Plug the tuner into your GM vehicle's OBDII diagnostic port, and follow the instructions provided to update the engine control module's program The new program will make sure that AFM never engages. My fear now is not will it happen but when! Apparently all passkey III keys are not the same,, I bought one that said for 2006 impala assuming all pk3 would be the same, and I could not get it programmed in my saab 9-7,, so how Im waiting on ones that specially said for saab 9-7. hoping they will work. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy They learned that the oil level sensor was necessary and that we were supposed to have been advised that we needed to reuse the original oil pan. I guess I might have to call a dealership or GM to get a definite answer on this one. If I put the Range module on, is that all I need to do, both now and long term? Any thoughts or suggestions would be appreciated. Or not because it is the cast iron block and not he aluminum block? Fortunately I received a reducing in house shop hourly rate. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. But after reading this thread, Im a little concerned about the long-term reliability. She had driven it for a couple of months that way. Will this AFM DISABLER damage anything???. I have a 12 with 4.8 Silverado 75000 miles Regardless of the AFM solenoid being commanded on or off. No movement on the rocker arms. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. It will show up as a misfire code in a cylinders 1,4,6, or 7. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? Definitely dont want to do anything to fix one problem and create another. What makes you think it was a design flaw ? The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). 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 . 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. The car runs great apart from the shuddering at those speeds. Never did strand me on the side of the road way. GM's Active Fuel Management (AFM) works under certain light load driving conditions to maximize fuel economy by deactivating 4 of the engines 8 cylinders. 2 15 with 5.3 Sierras both with 100k and In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. After reading these forums Im a little concerned about my decision to stay with GM. AFM/DFM Disabler - Range Technology Easier said than done. 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. There has been a lifter noise since I bought the truck 1 year ago. It does seem that when they start goingthey go quickly. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] Next day, fired it up to take the the junk yard and it ran great. Took it to my dads and he tore things apart and found that I had a lifter that was stuck. Is this due to the AFM being shut off? The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. Ill Never Ever buy another gm. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. Carbon Build-Up in the Intake Ports. . They replaced all the lifters, said no other damage, problem lifters were on cylinders 6 and 7. As a side note, Range Technologies recommends removing the disabler between visits to the dealer as they will need to access the OBD-2 port. Dummy Me thought gm learned its lesson in 1981 but they never did and I Too am stuck with a Buick thats just waiting to self destruct. We chickened out though and just bolted the AFM solenoid plate onto the used engine. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. Ayush Srivastava It has AMF. Having it fixed now, just curious Seems like a problematic design. Not sure which direction to go from here. No clue what to do. The dealer in Rockhill, SC when asked only said they had not had a problem. Open to suggestions about best course of action. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. Replaced all 16 lifters due to collapsed lifter on CYl #4. I had one fail and it chattered the cam to the point that I had to Install a new cam. 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. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. Found that all passenger side cylinders are not firing. . the extra oil isnt needed. I still get a P0336 code every once in a while but still good to drive around town. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . the body is in great shape. 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. TheAFMsystem can be identified by its components. 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). What would you do if you were in my situation? Unfortunately, I found out about the lifters too late. yep, you are 100% Right, I called a local saab shop and they filled me in, in 2005 the trailblazer and clones have DOD (displacement on demand), My next issue is getting extra ignition keys on the cheap. I just bought a 2018 Silverado. 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. in your opinion will this work, i really dont see any reason it wouldnt. There are so many moving components in an engine these days as opposed to the past. Im crossing my fingers it does the trick! Have there been improvements in more recent model years employing AFM [2014 or newer]? It has 8,000 miles on it. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. 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 you are using VVT, you could use the NAL-12612273 (L92) cam. Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. Glad I did. [], [] way. There are 5.3 cylinder deactivation problems that can occur. Also putting in a new transmission vs. rebuilding. 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. It replaces the AFM components with standard parts. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. It prevents the computer from switching over to four-cylinder mode. I ran 0W-20 no more the 5000 miles between changes. You will get codes thrown if the afm is physically removed without telling the ECM you did so.