AFMengines use special lifters for cylinders 1, 4, 6, and 7. I want to put a AFM disabler in it what all do I need to have done. stalled in a certain way a warning wouldn be a bad idea. 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. We were getting a code that the cam position sensor was not functioning properly. Im praying that my RangeTech buys me a few years. 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. 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. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? 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. 8000 grand for the repair mine was 1,700.00 to repair, I had a 2004 small block v8(4.8) 331,000 miles on the truck,it was the usual on the maintenance front axles,etc. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. The collapsed lifters will not engage the pushrods and both valves remain closed. 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. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. I have already dropped a lot of money on this truck (08 suburban). Given maximum engine power is not required during the majority of everyday driving, AFM works to deactivate engine cylinders when they are not needed, such as when cruising on the highway, thus. All Gen IV engine blocks haveAFMtowers and oil passages cast in. It seems to me that the high volume oil pump should not hopefully cause premature wear but if it is pushing more oil through the heads than I guess the valve stem seals have more work to do. 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. I read something the other day which I found to be funny. Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). Required fields are marked *. Most of the complaints show up in the 2009 to 2011 model years. Just one. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! 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 . What makes you think it was a design flaw ? . Should I buy one to disable the V4 mode? Perhaps a flaw by design would be a more appropriate description . Call chevy.They should being paying most of that. Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. I just did the delete and replaced the cam as well. do you fill to capacity anyways???? Hi my name is noel I am a mobile mechanic and I have a client that was having trouble with the lifters on a 2011 gmc yukon Denali 6.2 I placed the lifters after finishing I still had a problem with cylinder 8,6,3 rocker arms were not moving so I replaced the cam OEM part but still having miss fire on cylinder 6 what should I do to get rid of this problem, [] computer cannot switch over to four-cylinder mode. Vehicle has been serviced more regular than the manual calls for and the AFM has caused problem after problem with fouled plugs. I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. Looking forward to input from the forum, Thank you. Fuel pump failure is the most common problem and can occur due to a number of reasons, such as a clogged filter or a faulty pump. Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? I loved this rtuck until this happened!! Cylinder Deactivation to the Rescue. No problems with any to this point. Is this the shield you referred to in a past post? Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. 1. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. However I do have 7 year bumper to bumper warranty that covers this problem if I start to get lifter problems over the next 2 years.. On the other hand if get the AFM disabler installed I am pretty sure that I void the warranty from what I read on the policy. There has been a lifter noise since I bought the truck 1 year ago. 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 . As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. Fortunately, the old engine hadnt been shipped back to the remanufacturer. I would. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. When cylinders are deactivated, the number of crankshaft rotation increases between firing pulses. So I researched and got an AFM disabler. Thanks for the advice Brian! Not sure what else it can be. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. Every one of these engine will have a lifter fail, this is a travesty! They dont so any better than domestics on mpgs. 2 15 with 5.3 Sierras both with 100k and Because its not just GM that have engine problems. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. It uses a M14 x 1.5 thread plug like Dorman 65217. I am going to do the full repair of the engine now, but not an overhaul (too hard to get at the pan). 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? Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. Thankfull for any ideeas! My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. 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. On the AFM lifters that dosnt work i have installed them With the oil hole Down! Told her that it would not last and that she needed to find a different way to get around. AFMlifters have a history of failing and oil consumption can be a problem. It actavated the lifter? 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. You are correct. Pushing forward. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? Now you tell me AFM works and I will tell you; that you are full of shit! changed oil , its all working now, but want to disable this sorry system. One must anticipate this. I only had 81k on the motor. hi brian when you replace the lifters do you have to change the guides also? I got a 09 Chevy Ive had the 1 go out then the 7 about 2 weeks apart if I known what I know now I wouldve changed them all at once but now I have a misfire on cyl 4 but it came back in why are these lifters going out one at a time like this the 1st two that went out I was coming off the interstate an stabiltrack came on now the 4 misfired twice both times pullling out my driveway. My daughters car had about 230,000 miles when she complained of the problem. Hi Mike, the metal shield you noticed is probably the windage tray. I have a Yukon 116k it now needs its 3rd set of lifters and cam. But then she passed away from cancer. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. the extra oil isnt needed. I have a 2014 Silverado with a 5-3. Ketil, let us know what you find out. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. Ayush Srivastava 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. There are so many moving components in an engine these days as opposed to the past. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. Lost number four GM switched over to the 4100 v-8 in 1982. Battery was unplugged for a week.. They shift cam lobes by sliding the cam, never actually shutting down the value but riding a different lube! My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. TheAFMcylinders are opposite of one another in the firing order. I have been assuming this is just a slow to pump-up lifter or lifters. If someone didnt want to spend gas buy a Toyota. Took it to the dealer and was told I had a collapsed lifter. I had purchased an extended warranty when I bought the truck new. CHANGE YOUR OIL!!!!! the body is in great shape. "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. I own a reputable repair shop. Brian, Hi Grant is that disabler still working for you ? [], [] as the LS engine familys hybrid engine in trucks and SUVs. Dod is the biggest failure sence the 8-6-4 caddie in 1981. Thanks for your help. Do you think I can still disable AFM? I am hoping this does the trick. i just bought a 2018 Silverado with the 5.3 Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. I cant really tell from driving. Some guys have been able to use a tool through the top with the cover off to get it to release. Question is, since my 2004 ECM and wiring harness were made before the AMF came about will this motor work properly as a V8 or will I need to replace the lifters, cam, oil sensor, etc as the delete method mentions? The engine will switch to operating on fewer cylinders when cruising at a constant speed. A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. I am wondering the same thing. Im crossing my fingers it does the trick! My question is: do I install the electronic disabler on the new engine to avoid future issues? It was well researched and tested back in the late seventies and eighties . IMHO . Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . 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. Since no air can get in or out, four cylinders provide no power.

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