gm cylinder deactivation problems

I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. . 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 []. I have a noise in the engine but it seems to go away when revved up. She had driven it for a couple of months that way. 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. Just one. AFMengines use special lifters for cylinders 1, 4, 6, and 7. 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. Correct me if Im wrong- If such an item was available couldnt you then just replace the lifters in the 4 AFM cylinders and then just run a disabler or have your ECM/PCM reprogrammed to have AFM disabled permanently. Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. But it also restricts passages that the oil runs through. Having a hard time finding one .. On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . If so what would the vin code be? What type of ODBII gadget did you use? .IMHO . At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. If you already own this engine you will need to deactivate the AFM system or even better DO NOT buy any GM vehicle with this engine. another common cause for low OP is the oil pick up tube O ring. Better airflow reduces drag on the pistons and the associated pumping losses. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. Once I get it back, could I install the Disabler safely. The detergent. If the 4th cylinder lifter has failed, would driving it damage the engine? I would just have the AFM disabled (tuned out) then. Did not help. Toyota will be my next truck unless GM owns up and makes wright with consumers. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. They layed over night in engine oil before instalation. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. I asked my local Chevy dealer, from whom I purchased the engine, to find out why the oil pan lacked the fitting. 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. 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). 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? But after reading this thread, Im a little concerned about the long-term reliability. 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. , Production date on the vehicle is 04/2006 oddly enough. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. I noticed this discussion mainly addresses Chevy Silverados and other trucks? I just got new warranty engine and dont want this issue again? Im always sorry to hear when people run into issues like these. Engine starts but is throwing a misfire on cyls 4,7. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. 2 15 with 5.3 Sierras both with 100k and NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. Ill Never Ever buy another gm. also in the pan is another AFM oil filter near the external engine oil filter. Some guys have been able to use a tool through the top with the cover off to get it to release. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. Should I buy one to disable the V4 mode? I had one fail and it chattered the cam to the point that I had to Install a new cam. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? Found that all passenger side cylinders are not firing. We believe this confirmed that the AFM has never been operating in this vehicle. 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. What was happening to the first is slowly (or quickly in your case) happening to the others. Dave, I also have a 2008 LTZ avalanche with 106,000 I have the exact same symptoms at this point I just want to sell it will the disabler help remove the check engine light wont pass inspection with light on thanks for your help Chris. Had nothing but trouble out of it. Unfortunately, I found out about the lifters too late. I have an 07 Silverado 1500 ltz. I sold them when they were new. Chris, when you did your delete, did you also change the cam at the same time? The 2016+ Tacomas are junk. All eight cylinders are now powering the engine. [] 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. Problems After AFM Delete And How to Solve Them? - Tools Bible There is a good chance that some of the drivers side lifters decided to go. Just pulled it down in the garage there was no other damage , luckily. Don't even get me started on the shortened life of the cooling, starting and charging systems. I hate it. 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? Clean oil is crucial. It will show up as a misfire code in a cylinders 1,4,6, or 7. 5.3-liter Chevy Engine Problems: What Should You Look Out For? Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. I have a 2012 Chevy Avalanche. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. 4,7 plugs foul runs rough at idle. hi brian when you replace the lifters do you have to change the guides also? The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. I want to put a AFM disabler in it what all do I need to have done. If possible, will simply not using VVT provide a powerful,good running engine? Getting 20 mpg in town and 24-28 mpg highway and love the truck now with these mild tweaks. Having it fixed now, just curious Seems like a problematic design. If under the truck while parked and it is doing it it sounds like it is towards the back of motor. Replace the cam or do the delete kit? 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). (Bought car 1 day before lifter died!) Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? We recently purchased an 08 Suburban and noticed some shuddering around crusing speeds, usually 45-55mph and highway speeds around 75mph. One the other hand, it came without AFM, VVT, or flex fuel capability. If you left the original cam in, the AFM cylinders will be down about 25 lbs. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. Just shut AFM off. If you ignore it and keep driving, odds are you will destroy the cam as well. Most will want to get rid of the AFM immediately. Told her that it would not last and that she needed to find a different way to get around. Is this an issue only with GM SUVs and trucks, or does it include cars too? I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? I only had 81k on the motor. Remembered that after I bought my Tahoe. The motor I pulled was a 2007 LY5 with about 77k on it. Cylinder Deactivation & Variable Engine Displacement - LiveAbout 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? module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. Install the disabler when you get your Yukon back and it will remain in good working order. They took the engine down today found so much damage inside they ordered a new engine from Detroit. Once the failure has occurred, the AFM shut off methods other than that probably wont work. Who knew? This happened on a camping trip with my kids last friday night. Our 2013 yukon with 47k miles just failed. All Gen IV engine blocks haveAFMtowers and oil passages cast in. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. 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. The LFA was upgraded with AFM and [], [] improvement over AFM, DFM has 17 different cylinder firing patterns and switches seamlessly between them to provide just []. [] For more information on AFM, including a comprehensive guide on how to completely remove it from your engine, check out this article. There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. Send response to tkrieg@cox.net. What type of disabler did you go with? They dont so any better than domestics on mpgs. PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 Put everything back together proper torque, gakets, valve seals, etc. Some drivers want V8 power under their foot at all times. Just recently, GM announced a temporary closure. The most common issue GM vehicle owners with AFM report is increased fuel consumption. Thanks. [], [] 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. It was good for about 10 miles and started with same loud knock noise. All the time. Have misfire code and engine has what I would call a surge while driving. From what Ive read new and low mileage engines with no issues is ideal to do a afm delete, tune, or use of a disabler. Solenoids, new lifters also test voltage to solenoid pack all good their, No movement on the rocker arms. Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. Still have no power. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. I was getting ~ 30 mpg, so I love that. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Does the Pressure relief vavle ever go bad?? Cost about $250, but it is not fool proof. GM offers the following diagnostic steps in determining if this is the problem. Thanks for the advice Brian! I ordered a electronic disabler for it today. Thankfull for any ideeas! I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. Hopefully more is known by then. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. It also mentions a valve cover replacement with revised PCV valve design. There has been a lifter noise since I bought the truck 1 year ago. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? . I drive the same 320 mile trip every two weeks and drive the same route and full tank. A tuner can often fix that as well by giving it some more ignition advance in these regions. NOT GOOD!! As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. 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? I am going to do the full repair of the engine now, but not an overhaul (too hard to get at the pan). Active Fuel Management - Wikipedia 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. We chickened out though and just bolted the AFM solenoid plate onto the used engine. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . https://www.cargurus.com/Cars/Discussion-t30884_ds822284. When you don't need the full power of the engine, it provides better fuel economy." I speak from some experience. This new lawsuit is essentially identical to the previous. 190k on the motor always ran AMSOIL full synth since new. No problems with any to this point. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. 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 []. How did your turn out? Everything was fine for two weeks, ow customer complains s it same noise it made as before. 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. CHANGE YOUR OIL!!!!! The 5 Most Common Chevy EcoTec3 5.3L Engine Problems Hello. Dont drive it if you have a dead cylinder due to afm failure. I have a Yukon 116k it now needs its 3rd set of lifters and cam. AFM - active fuel management strategy which deactivates the lifters on specific . You will get codes thrown if the afm is physically removed without telling the ECM you did so. Thanks. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. It has plenty of oil pressure and I put all new lifters in it. In other words, the crankshaft and bearings were not visible. I would appreciate any feedback. 2011 Chevy Avalanche LTZ. I can literally drive from Seattle to Redding CA on one tank. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. Ive only put a straight pipe exhaust, intake, and a boost controller on it. 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. This valve is located on the oil pan rail and prevents excessive oil pressure from negatively impacting the AFM components. Replaced all lifters. Last GM Ill ever buy unless its got a diesel. The engine will switch to operating on fewer cylinders when cruising at a constant speed. Hi Mike, the metal shield you noticed is probably the windage tray. Is the Pressure relief valve replaceable? Id wait until the warranty expires then disable. Yes a poor design but a flaw ? In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. When cylinders are deactivated, the number of crankshaft rotation increases between firing pulses. It has AMF. I recently bought a 2018 Silverado 5.3L with AFM. Any truth to that? GM 6.2 Active Fuel Management Problems: What They Are and How - CarAraC Would never take it on a long trip. I asume low oil pressure cant make some of the DOD lifters to malfunction? Billy, there is some interesting trivia here on the L92. Chevrolet Silverado 2014-Present: Common Problems The original version sprayed oil on the cylinder walls and increased oil consumption. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. So I researched and got an AFM disabler. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. This is in response to pretty much everyone. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. Would it be fine to go ahead with the AFM Disabler? Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy Drives way better for my mostly paved road driving. I dont plan on installing the delete kit at this time. $8500.00 fix. 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. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. 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 . 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. Im considering just replacing the 5.3 ( should be LMG, 2007 YUKON ) with the L96 crate engine. 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. Its not possible to install them wrong? Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. It uses a M14 x 1.5 thread plug like Dorman 65217. Take a look at what bmw did in its R1250 bike. Took the heads off again. Getting ready to diy for $450. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. 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. So now at 168 thousand miles it still runs good but gets bad gass mileage. It actavated the lifter? 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. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. I would say maybe 5% of my customers keep up on their oil changes. I would appreciate it if you let me know how you make out. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? The 2nd went with a conventional valvetrain. Carbon Build-Up in the Intake Ports. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? Next day, fired it up to take the the junk yard and it ran great. I have had some say that it is the valves and others say that it is the cats plugged. This should be added to your earlier model if you experience oil consumption. 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. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. I ran 0W-20 on more the 5000 miles between changes. Then had to drive the truck back to Tampa from Cheifland Fl. You cannot compare them to old 350s. I am a long time GM fan but after reading how they messed up the 5.3 ( I had a fantastic 2003 Z72 off road) Ill look else ware for my next vehicle. it is the regulator guy! Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. 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. whith a disabler. I am wondering the same thing. 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. It is being covered under warranty since I only have 72,000 miles on it. any help? Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. I got the AMF disabler anyway and so far so good. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . Any problems to watch out for?Did you replace the VLOM? . Glad I did. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. Didnt change exhaust nor tune so likely no change in power/torque. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. He used seafoam and changed to synthetic oil. [], [] way. The engine will operate on 8cylinders, or V8mode, during engine starting, engine idling, and medium to heavy throttle applications.

How To Scan Double Sided Documents Canon Tr4500, Newport Oregon Accident Today, Casa Pequena De Renta En Pasadena, Tx, Lord Of The Flies Connections To Current Events, Articles G