gm cylinder deactivation problems

[] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. Im always sorry to hear when people run into issues like these. Getting ready to diy for $450. 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. Cylinders two, three, and eight are all similar in cylinder deactivation. I ave noticed the point about excess oil spray. Your email address will not be published. Delete the AFM, buy a tuner/chip, take it to a performance place and get an actual tune done that fixes it, replace the AFM lifters with non AFM type, change other engine components with thisetc..etc..etc??? 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. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. Because I want to. [] they have a downside? 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. Did Obama make them do this? Welcome to socialism folks . Fortunately I received a reducing in house shop hourly rate. With the nipple, or without? Everything was fine for two weeks, ow customer complains s it same noise it made as before. The problem:. 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. I will keep reading and take notes. A 14 gmc 5.3 Sierra 85000 miles I was told that before I start the vehicle up I will need to have the AFM and VVT disabled in the ECU but that would require a custom tune from a tuner as the ECU cannot just be told that the AFM and the VVT is gone. They layed over night in engine oil before instalation. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? If you ignore it and keep driving, odds are you will destroy the cam as well. I have an 07 Yukon with over 180K. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. Help appreciated. I did noticed the oil consumption but it was rare that I would have to add oil. 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. On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. Just one or two. If the 4th cylinder lifter has failed, would driving it damage the engine? I am hoping this does the trick. [], I have a 2012 Silverado Z71 bought new. With that said, the current global chip shortage has been affecting the industry on a wide scale, forcing production halt among several automakers. You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy We did take it apart to check for metal possibly being trapped inside, it looked like brand new. Thank you for your time. All New lifters were from AC delco. All Gen IV engine blocks haveAFMtowers and oil passages cast in. This lowers the cost of building it [], [] aluminum block engine. 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 a 2008 Buick Lacrosse super that I am having a hard time finding a tuner or a tune shop that can turn off the afm. 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. I love the car so far. CHANGE YOUR OIL!!!!! Dont want to make a move on a new truck or jump to a 2500 yet. Who knew? It works . Once the lifter has been damaged, the cam is probably also damaged. . A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. Everything else looked good. I am confused about the plug in disabler. My daughters car had about 230,000 miles when she complained of the problem. AFM Sucks!!! Engine starts but is throwing a misfire on cyls 4,7. Do not pay that amount. Install an AFM Delete Kit Wow, thanks for the wisdom,, i checked my VIN Code (position #8, M=LH6) and my 2005 Saab 9-7x does have the LH6 motor with iron block, Are you sure its only 2007 & newer motors? I have an 07 Yukon with 230k on the engine. Just one. Pushing forward. I ordered a electronic disabler for it today. Didnt change exhaust nor tune so likely no change in power/torque. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. Pulled right valve cover an rockers on syl 6 dont move. I got the AMF disabler anyway and so far so good. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? 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. Engines with AFM use a high-volume oil pump. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. is it still working good since you have done that with the trans fluid? Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. Had similar problems under warranty, no telling what they rigged me up with at the dealer. They lasted one year with big problems. This allows the engine to run in V8 mode. I have a noise in the engine but it seems to go away when revved up. [] 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. It was good for about 10 miles and started with same loud knock noise. 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. I own a reputable repair shop. Teflon coatings does not last. Can they be faulty? After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. Having a hard time finding one .. It has 8,000 miles on it. [], [] way. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? So for all of you that continue to complain about how bad these things are. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? They dont so any better than domestics on mpgs. Once the failure has occurred, the AFM shut off methods other than that probably wont work. Should I buy one to disable the V4 mode? The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. You may want to update your post. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. Is this an issue only with GM SUVs and trucks, or does it include cars too? 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. Also putting in a new transmission vs. rebuilding. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. 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. Now I know why there wa such a push to get older ,less efficient vehicles off the roads. I hate it. lol. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. I would. They may be able to find some of those missing ponies. Toyota has their own problems. Very confusing stuff out there. 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. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. Why would GM ever produce such problems with such little to gain. Have misfire code and engine has what I would call a surge while driving. After reading these forums Im a little concerned about my decision to stay with GM. Is this the shield you referred to in a past post? 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. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. We figured we already had the intake manifold off to install the engine, why run the risk of MIL only to have to removed the intake manifold again without being paid. Since the tranny oil worked, you should now change the oil, right? Brian, It is currently at the dealer having a new long block installed under warranty. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Then it takes out the lifter again and again until you bite the bullet and replace the cam. []. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. The LZ1 was upgraded with AFM and []. thank You so much! Im curious as to how much tran fluid you put in? thx Brian, Knock on wood I drive a 2011 silverado 44 Ltd with the 5.3 AFM/DOD not tuned out or delete being used and have experienced no problems or any sign of problems for that matter juat rolled over 210,000 all original factory parts would you suggest I tune it out or juat let it ride I change my oil religiously and also use lucas products for all aspects of my motor. I couldnt agree with you less, yet I respect your opinions. 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. 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? My 2011 Tahoe has a LMG motor in it with a build date of May 2011. It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). 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. 4,7 plugs foul runs rough at idle. 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. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. Not sure which direction to go from here. 1. All ready done valve job . I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. Would installing the Disabler solve this? If under the truck while parked and it is doing it it sounds like it is towards the back of motor. Have not had a problem yet. Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? 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). Im confused from the write up about the plug in. 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? Accept i only have 60K on my truck and it hasnt recovered. New plugs and wires. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). What can I expect with the AFM in place, or, with AFM disabled (not deleted)? Toyota will be my next truck unless GM owns up and makes wright with consumers. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . 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. My ignition lock cylinder is completely stuck in lock position with the steering wheel locked as well. Thanks for the detailed post! 330-630-0240. 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. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. 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. Change your oil. There are so many more oil passages on engines these days. But the problem at that time was the computer technology. Only thing I noticed with the oil consumption issue. Corvette that does employ AFM. 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. It had the AFM wiring & lifter cover installed with solenoid pack in the original engine, we even removed it to inspect. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. Fortunately, the old engine hadnt been shipped back to the remanufacturer. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. I have a 2011 Chevy Tahoe with the 5.3 Gen 4 LS (VIN Code 0) and I bought a CAM motion DOD/AFM delete kit, 3 bolt drop in CAM Motion stage 2 camshaft, VVT delete kit and finally a Diablo Predator 2 Premium for GM programmer. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. I am going to do the full repair of the engine now, but not an overhaul (too hard to get at the pan). Last GM Ill ever buy unless its got a diesel. Would never take it on a long trip. These trucks cost too much to have a terrible product. Given that, would you recommend buying one of the OBD-II devices to disable AFM? I am trying to prevent same issue. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. 2 15 with 5.3 Sierras both with 100k and I have a 12 wit 4.8 Silverado 75000 miles Why this happens is a more . I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. Most will want to get rid of the AFM immediately. Does the disabler prevent the engine damage in the first place? I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. GM switched over to the 4100 v-8 in 1982. [] 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 []. Pod. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). whith a disabler. How is that an improvement. 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. All Cylinders. I would appreciate it if you let me know how you make out. The lifter seems to recharge whenever the truck sits for some time. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. I have no clue what to do now. Ketil, let us know what you find out. Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. He claims that GM used the same engine whether it was or was not equipped with AFM in this year and model? $8500.00 fix. I am worrking on a 2007 chev Silverado 6.0 engine, [] the L76 that was equipped with AFM and had a ribbed valley cover, the L98 cover was []. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. Replace the cam or do the delete kit? I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. Can you tell me what needs to be done with the VVT? After taking a $3.6h bath on the lifter/valve work and doing a little research, how can GM allow a problem like this AFM continue from 07 to present? AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. 50,000 miles. Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. "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. There is a chance the cam lobe was stressed and started to deteriorate. 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. Thats a tough call, if the warranty will cover itId let it run out. That might show up if you cut the filter and looked for debris in the pleats. 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 . 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. My 5.3 has a vin code of O. Some guys have been able to use a tool through the top with the cover off to get it to release. 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. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. 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. Driver reported this occurred suddenly while driving down the highway. AFMlifters have a history of failing and oil consumption can be a problem. Chris, when you did your delete, did you also change the cam at the same time? You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. What type of disabler did you go with? Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. I had to replace them all and the camshaft as well. misfire or anything. 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 traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. Brian, I have been reading your article about the AFM. 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. 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 .

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