Any thoughts or suggestions would be appreciated. It was good for about 10 miles and started with same loud knock noise. Did Obama make them do this? Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. Fouls those plugs. I have also heard that the oil pump is to be changed and I have also heard that it does not matter.
GM Escalates Cylinder Deactivation With Dynamic Fuel - EngineLabs 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. This basically deactivates the cylinder deactivation system. Love the truck. , Production date on the vehicle is 04/2006 oddly enough. I have always loved Ford and Chevys , I dont like this Vehicle not one bit, starring shaft has to be lubed or it whines, front A arms has done been replaced, tapping in motor, leaf springs has been lubed, retorqued, put completely new leaf springs back in on the rear , grease all down from rims to body of truck, you have to clean often,console shakes as if milk shakes in console which later they also put rubber bushings in front of coils of shocks ( front end) .You lock it down in 44 it s metal to metal , As of now Im at 32,000 done gone threw all the arbitrator laws depending on how it goes?
Cylinder deactivation | GM Truck Club Forum I will keep reading and take notes. Thanks. Regards, i just bought a 2018 Silverado with the 5.3 So now at 168 thousand miles it still runs good but gets bad gass mileage. I ordered a electronic disabler for it today. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. 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. I couldnt agree with you less, yet I respect your opinions.
Active Fuel Management About Gone From 2022 Silverado Lineup - GM Authority Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. 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? I have read synthetic isnt good for AFM lifters. 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. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. [] For more information on AFM, including a comprehensive guide on how to completely remove it from your engine, check out this article. I have ordered an ATM disabler and will be putting a can of Textron in the gas at the next fill up. Pulled right valve cover an rockers on syl 6 dont move. Stopped at nearest gas station and found I was a quart low on oiladded oil and lights eventually went off and luckily we made it the 5 hour drive home. Install an AFM Delete Kit General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. [], [] way.
Another General Motors 5.3L V8 Lawsuit Filed | GM Authority Oil 0w or 5w -20 He used seafoam and changed to synthetic oil. They lasted one year with big problems.
The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit 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! Cant believe they havent fixed this in a decade. This is what I keep telling people. I wont bother with blocking the relief valve. I noticed this discussion mainly addresses Chevy Silverados and other trucks? 1. 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. Im a little confused on the problems too, Im reading that the 2007 pick-ups with 5.3 really had bad oil consumption and plug fouling problems, but is the 2005 5.3 that came in the trailblazers, envoys, and sabb 9-7s the exact same design as these pick-ups and prone to the same failures? 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. Ill Never Ever buy another gm. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . On June 4th you stated 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) I am looking at purchasing a 2012 Tahoe with the LMG per the build sheet. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. The car runs great apart from the shuddering at those speeds. Yes thats true.
2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! Regarding the cylinder deactivation impact on fuel consumption . please respond with your opinion. I service plenty of these vehicles with AFM, and the ones I have to open up the engine for repair because of a failure doesnt surprise me anymore. GM should recall every vehicle with this terrible design flaw! Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? 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. I love the car so far. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. I also have 08 Burb, but have different symptoms (high oil consumption, blue exhaust smoke at start, and now a really rough start after sitting overnight). When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. The 2nd went with a conventional valvetrain. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. I have a shop 39 yrs . Because I want to. 50,000 miles. 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. Didnt change exhaust nor tune so likely no change in power/torque. This should be added to your earlier model if you experience oil consumption. My 2012 Silverado 5.3L just did the same thing as your Tahoe Brian. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. [] 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. I had one fail and it chattered the cam to the point that I had to Install a new cam. Covers me to 100K. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem?
GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority How to Fix GM's Cylinder Deactivation Problems Will this AFM DISABLER damage anything???. 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. I recently bought a 2018 Silverado 5.3L with AFM. Its got a hundred forty-five thousand miles on it. This is my second Avalanche and I never had any issues with either of them. Put an S&B cold air intake on last week with huge oiled filter and it made a big improvement in throttle response and it appears possibly a slight improvement in mileage. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. it is the regulator guy! 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? The LZ1 was upgraded with AFM and []. My daughters car had about 230,000 miles when she complained of the problem. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? Thanks for your help. 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. Would you get enough power to drive at freeway speeds? Have an intake and Borla exhaust. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). Take a look at what bmw did in its R1250 bike. I just did the delete and replaced the cam as well. This really sucks. Accept i only have 60K on my truck and it hasnt recovered. I sold them when they were new. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. I tried the trans fluid in the oil. Can you tell me what needs to be done with the VVT? 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. It does seem that when they start goingthey go quickly. I would appreciate any feedback. Toyota has their own problems. You can monitor the oil level on your dipstick for 3,000 miles to determine if the deflector or plug would be needed, but chances are you wont based on the TSB. I have a 2012 Chevy Avalanche. Chris, when you did your delete, did you also change the cam at the same time? I had the same issue and had to have the AFM information deleted from the computer and the car tuned. The engine was not Flex Fuel (E85) capable and did not use Variable Valve Timing (VVT) [], [] TheL76like its LS2 siblingis a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks. The biggest problem is nobody changes their oil on time. Billy, there is some interesting trivia here on the L92. It replaces the AFM components with standard parts. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. CHANGE YOUR OIL!!!!! Hi Grant is that disabler still working for you ? 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 []. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. Changing the sensor didnt help. I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. misfire or anything. 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. Thankfull for any ideeas! Hopefully he can free up the stuck/collapsed lifter. The lifter came apart and chewed up the lobe on the cam Im selling it I also told my friend at work when he asked me about my truck .I said Ill never by another GM ever. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. Its Chrysler and Ford. Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. It essentially turns your V8 engine into a V4 which saves fuel. 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. Its a CA EMMISIONS TRUCK. I have the towing package on my 13 Tahoe LTZ. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. When you drain the oil at three to four thousand miles its still clean. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. The most common issue GM vehicle owners with AFM report is increased fuel consumption.
Go Small? Common Problems With the Chevy Silverado 2.7L Turbo My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish.
Chevy Silverado V8 To V4 Problems - Tools Bible Why would GM ever produce such problems with such little to gain. With 44, its a enormous Jon to remove the oil pan. Unplugged AFM engine only runs on 4 cylinders #2,3,5 and 8. Any help would be appreciated. If you dont have VVT, you could use part number NAL-12561721 (LQ9) along with a 4-pole 3-bolt 2005 Corvette cam sprocket p/n NAL-12586481 to make it compatible with your ECM. It is replaceable.. just remove oil pan and it will be on top at the filter. In other words, the crankshaft and bearings were not visible. another common cause for low OP is the oil pick up tube O ring. I had a 2007 Yukon XL 5.3 with the AFM. But it also restricts passages that the oil runs through. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. Battery was unplugged for a week.. Every one of these engine will have a lifter fail, this is a travesty! Just one or two. Do not pay that amount. I have had some say that it is the valves and others say that it is the cats plugged. I have an 07 Yukon with 230k on the engine. Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. The exhaust valve remains open during the intake stroke and closes just before BDC. A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. 330-630-0240. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. The engine has flex-fuel capability. The collapsed lifters will not engage the pushrods and both valves remain closed. My 5.3 is. Is this due to the AFM being shut off?
2019 Chevy, GMC Trucks Get Smarter Cylinder Deactivation - Car and Driver An electromechanical system deactivates and reactivates all 16 of the engine's hydraulic valve lifters, controlling valve actuation. .IMHO . How did your turn out? My 2002 I had over 298K on it with no engine related issues.
Problems regarding Chevy 5.3L engines ticking noise and misfire. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA).
How to Delete or Disable Active Fuel Management (AFM) on GM Engines Very confusing stuff out there. The valve itself is part number W0133-2574213. Or not because it is the cast iron block and not he aluminum block? I dont plan on installing the delete kit at this time. Fortunately I received a reducing in house shop hourly rate. Truck ran fine before that. It uses a M14 x 1.5 thread plug like Dorman 65217. It actavated the lifter? 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. Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . When an engine is contstantly running on oil that is broken down, it not only wheres out components because of no protection. Would it be fine to go ahead with the AFM Disabler? TheAFMsystem can be identified by its components. Because its not just GM that have engine problems. Had similar problems under warranty, no telling what they rigged me up with at the dealer. is it still working good since you have done that with the trans fluid?
GM 6.2 Active Fuel Management Problems: What They Are and How - CarAraC This is my project car and will be my drive (about 5000 miles a year). 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. The result is improved combustion chamber pressure as the piston approaches top . 1. I only had 81k on the motor. My 5.3 has a vin code of O. Truck has an active P0300 code and runs very rough. The only problem is the extra spray on the cylinder models if a deflector isnt used and this can show up as increased oil consumption. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. Ive been reading, with disgust and concern of the lifter/cam situation. If a shop pulled a DTC code P0300 and found AFM to be the issue, it may not be too late to try the disabler. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. 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. They layed over night in engine oil before instalation. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. Dont want to make a move on a new truck or jump to a 2500 yet. It was in the late 70s or early 80s and it was a POS, Your memory serves you pretty well I too have the same nightmares lol.
The Hit and Miss Nature of Cylinder Deactivation Systems There has been a lifter noise since I bought the truck 1 year ago. I have a 12 wit 4.8 Silverado 75000 miles The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly. Then I guess I have to spend a bunch of money and get the delete kit. . Is this an issue only with GM SUVs and trucks, or does it include cars too? Todays computers are faster so it does work. Don't even get me started on the shortened life of the cooling, starting and charging systems. Love the truck so far. I recently took a long trip and it burned 1.5 quarts of oil. Disable the afm. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. If I had wanted a 4 banger I would have bought one. It came back on last Wednesday starting with a flash. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. The biggest difference between the Vortec engines that used to be found in Chevy and GMC vehicles and the EcoTec engines found in them now are the fueling methods. Excess oil will be pushed out of the pressure relief valve into the oil pan. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. I was getting ~ 30 mpg, so I love that. She started to have the lifter problem again after 60,000 miles more. . Having it fixed now, just curious Seems like a problematic design. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. []. We were getting a code that the cam position sensor was not functioning properly. She had driven it for a couple of months that way. Was a disaster then but a profitable disaster. All ready done valve job . I would just have the AFM disabled (tuned out) then. But after reading this thread, Im a little concerned about the long-term reliability. The oil pump is high volume, but there are a lot of people that dont change it and rely on the pressure valve to keep the volume manageable.