gm cylinder deactivation problems

Everything was fine for two weeks, ow customer complains s it same noise it made as before. I dont plan on installing the delete kit at this time. When you drain the oil at three to four thousand miles its still clean. I would. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. 1. How about if they just let us have a manual transmission agains for fuel mileage? Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? Would never take it on a long trip. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. GM claims fuel improvements ranging from 5%-15% depending on the engine. I know I felt the same way. Hi Grant is that disabler still working for you ? Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . Remembered that after I bought my Tahoe. [], [] way. 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. When they are locked into position, they wont wear further and cause issues down the road. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. Its not possible to install them wrong? My daughters car had about 230,000 miles when she complained of the problem. Can they be faulty? The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. Is the Pressure relief valve replaceable? Now I get 24 to 26 with deactivation locked out and full power. Double digit MPGs in my 98 K1500 would be a dream lmao. 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 bought a 2010 GMC Sierra 5.3L Truck in 2013 with 24K miles. I cant really tell from driving. Hopefully he can free up the stuck/collapsed lifter. 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. I got the AMF disabler anyway and so far so good. 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. 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. She drove it for another 35,000 and it went out again. Brian, thank you for the quick response. How to Deactivate AFM, DFM, MDS, and Start/Stop To Prevent - Holley (Non-AFM engines have a smooth cover.). Regarding the cylinder deactivation impact on fuel consumption . [] cherry on top is that it isnt saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. I have read synthetic isnt good for AFM lifters. I would say maybe 5% of my customers keep up on their oil changes. 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. Im crossing my fingers it does the trick! Why cant u just unplug the solenoid on back of engine by oil pressure sensor? Just pulled it down in the garage there was no other damage , luckily. Accept i only have 60K on my truck and it hasnt recovered. I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. 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? Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. Ill Never Ever buy another gm. AFM Sucks!!! Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. I quites down to nothing after running for about a minute. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. GM should recall every vehicle with this terrible design flaw! From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? . 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. what deleter (if thats a real word) have you heard good things about. With that said, the current global chip shortage has been affecting the industry on a wide scale, forcing production halt among several automakers. They dont so any better than domestics on mpgs. Looking forward to input from the forum, Thank you. CHANGE YOUR OIL!!!!! There may be an ignition related issue on that cylinder. The lifter seems to recharge whenever the truck sits for some time. They layed over night in engine oil before instalation. 330-630-0240. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. Chevrolet 5.3 Engine Issues and Recommendations Shame this happened. It came back on last Wednesday starting with a flash. 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. 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. Cost about $250, but it is not fool proof. I know a few guys with Tundras. This is my second Avalanche and I never had any issues with either of them. . I love the car so far. I loved this rtuck until this happened!! Engine starts but is throwing a misfire on cyls 4,7. 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. But if you dont like it. Why does GM's cylinder deactivation cause lifter failure? Dod is the biggest failure sence the 8-6-4 caddie in 1981. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. They have plastic casing, so you can imagine what will happen with aged plastic. If I put my truck in manual 5, it doesnt try to go into V4 mode. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. I am hoping this does the trick. GM Escalates Cylinder Deactivation With Dynamic Fuel - EngineLabs Ive only put a straight pipe exhaust, intake, and a boost controller on it. The engine will switch to operating on fewer cylinders when cruising at a constant speed. It seems this tough engine has everything incorporated into it. The valve itself is part number W0133-2574213. It is currently at the dealer having a new long block installed under warranty. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. Is this the shield you referred to in a past post? I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. Disable the afm. Took it to my dads and he tore things apart and found that I had a lifter that was stuck. Any thoughts or suggestions would be appreciated. Change your oil. Most will want to get rid of the AFM immediately and VVT isnt for []. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. How do you know if the lifter has failed? $8500.00 fix. Deactivating cylinders at light load forces the throttle valve be opened more fully to create constant power, and allows the engine to breathe easier. I went with the new motor for the warranty. Next day, fired it up to take the the junk yard and it ran great. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. 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. [], [] 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 2013 LC9 just had #6 lifter fail, got a misfire code but the ticking gave it away. 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. After reading these forums Im a little concerned about my decision to stay with GM. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. He used seafoam and changed to synthetic oil. You cannot compare them to old 350s. Then again, it should have never been controlling those solenoids. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. If someone didnt want to spend gas buy a Toyota. Most will want to get rid of the AFM immediately. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. Replaced all 16 lifters due to collapsed lifter on CYl #4. There is a chance the cam lobe was stressed and started to deteriorate. So I did the job one more time. No problems with any to this point. I have also heard that the oil pump is to be changed and I have also heard that it does not matter. Im always sorry to hear when people run into issues like these. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. [] 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 []. 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. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Constant engine and transmission problems. 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 . Runs better than new now and no more oil consumpsion!! It will show up as a misfire code in a cylinders 1,4,6, or 7. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. This really sucks. I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. There are so many more oil passages on engines these days. [], I have a 2012 Silverado Z71 bought new. No movement on the rocker arms. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power.