Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. 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? Bought an 07 GMC Yukon 5.3 with the AFM, 87k. As you said, the ECM was never seeing the AFM so I think youre good to go. i just bought a 2018 Silverado with the 5.3 They layed over night in engine oil before instalation. The Jury is still out on the Gen. 5s but the warranty could be an issue. Dont want to make a move on a new truck or jump to a 2500 yet.
2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! I drive the same 320 mile trip every two weeks and drive the same route and full tank. Just recently, GM announced a temporary closure. I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. Just one or two. I am trying to prevent same issue. module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). The detergent. I just bought a 2018 Silverado. 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. is it still working good since you have done that with the trans fluid? I noticed this discussion mainly addresses Chevy Silverados and other trucks? The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. I own a reputable repair shop. Hopefully he can free up the stuck/collapsed lifter. Hi. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. All these comments on the 5.3 are blowing my mind!!!. [], I have a 2012 Silverado Z71 bought new. The exhaust valve remains open during the intake stroke and closes just before BDC. stalled in a certain way a warning wouldn be a bad idea. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? You mentioned that it will shoot oil into the pan and on the cylinder walls possibly causing some oil consumption So i have a running vehicle and my only concern is making it as reliable as possible, should I disable the AFM or not?? Your email address will not be published. Verified over hundreds of trips, makes no sense. With 44, its a enormous Jon to remove the oil pan. 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. the body is in great shape. He used seafoam and changed to synthetic oil. what deleter (if thats a real word) have you heard good things about. One alternative is to swap in one of the larger 6.0 non-AFM truck cams. I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor.
Why does GM's cylinder deactivation cause lifter failure? The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. However, the fuel savings are not always as much as expected. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. Now you tell me AFM works and I will tell you; that you are full of shit! 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. 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. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. 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??? A lot of drivers reported losing 2-4 quarts of oil in between oil changes. It is usually first noticed during highway driving. I would rather stay a V8 full time than deal with AFM issues in the future. I would say maybe 5% of my customers keep up on their oil changes. There are 5.3 cylinder deactivation problems that can occur. Run it and let it soak overnight. On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . I have a 12 wit 4.8 Silverado 75000 miles What type of ODBII gadget did you use? Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Perhaps a flaw by design would be a more appropriate description . This happened on a camping trip with my kids last friday night. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. Replaced all lifters on passenger side as well as pushrods for even wear. Having it fixed now, just curious Seems like a problematic design. I have a 07 Yukon with 180K and no issues what so ever. Would doing the disabler option once I get it back be the right one? Vehicle has been serviced more regular than the manual calls for and the AFM has caused problem after problem with fouled plugs. It has has 9000 miles and no lifter or other issues or codes so far. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. The wife however found this deal on an Envoy Denali . Ive been a Ford guy my whole life, so I was unaware of AFM until a recent trip where I did a lot of highway driving and happened to bring up the real-time mpg display, where I saw it switch between V6 and V4. Thanks for the detailed post! Your 1981 caddy was your fmu I got glue inside of it and it stuck the potentiometer for stochiometric if you get a new fmu or you pick the glue out of the potentiometer you can set it to stoichiometric and get a lot better fuel mileage as far as your truck why dont you look at the intake manifold I got a crack or a vacuum leak somewhere for gas mileage thank you truck service, Near 1981 its your fmu it has glue inside the potentiometer you have to either RNR it for a new one or pick the glue out of the potentiometer for stochial magic is the only variable resistor inside that you can turn with a screwdriver once you get the glue out of it itll read still kill metric just be careful and then you can set it properly with your own meter on your monitoring your O2 sensor and then on your Silverado thingy your 5.3 just check the intake manifold for lakes Ill get you a better gas mileage if you dont have any intake cuz theyre plastic and they crack and stuff like that other than that yeah thats it, Larry Jenkins, I have a 17 GMC Sierra 6.2 SLT, I got 25 to 27mpg regularly with 93 gas and cylinder deactivation. Thank you for your time. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes This replacement engine has the same camshaft sensor plug plug, 5 wire like the AFM would use, instead of the 3 wire. Most of the complaints show up in the 2009 to 2011 model years. hi brian when you replace the lifters do you have to change the guides also? 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. Theyre also notorious for bad cam tower oil leaks. We believe this confirmed that the AFM has never been operating in this vehicle. 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. These trucks cost too much to have a terrible product. Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. AFMengines use special lifters for cylinders 1, 4, 6, and 7. 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 . Chris, when you did your delete, did you also change the cam at the same time? Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. I was getting ~ 30 mpg, so I love that. Regarding the cylinder deactivation impact on fuel consumption . Some drivers want V8 power under their foot at all times. Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. 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. I always have done my oil changes on time, not sure about the people who owned it before me though. It replaces the AFM components with standard parts. How about if they just let us have a manual transmission agains for fuel mileage? Active Fuel Management (formerly known as displacement on demand (DoD)) is a trademarked name for the automobile variable displacement technology from General Motors.It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy.Estimated performance on EPA tests shows a 5.5-7.5% improvement in fuel economy. 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. Found that all passenger side cylinders are not firing. However, they are only functional on engines that usedAFM. Pulled the inntake and replaced valleypan With all the solenoids. AFM - active fuel management strategy which deactivates the lifters on specific . Yes a poor design but a flaw ? Seems my oil pressure sensor is bad, are showing the same oil pressure at all times, even when it dosnt run.Dont know it that fault was there before i replaced the lifters. I asume low oil pressure cant make some of the DOD lifters to malfunction? Because I want to. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. We were getting a code that the cam position sensor was not functioning properly. I have an 07 Silverado 1500 ltz. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. It could be the filter screen under the oil sending unit. 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. I would just have the AFM disabled (tuned out) then. I dont know where to being to look for the problem.
Problems regarding Chevy 5.3L engines ticking noise and misfire. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. [] they have a downside? Covers me to 100K. I loved this rtuck until this happened!! 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. I also notice that it doesnt go into V4 when it is cold. We did take it apart to check for metal possibly being trapped inside, it looked like brand new. 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. the extra oil isnt needed. Ive read at many websites that the GMCs envoys, Chevys and saabs did start to come with AFM in 2005 with the LH6 motor,It says here it started in 2006 on the saabs, then the pick-ups got AFM in 2007. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. Thank you again for the response. If AFM has been deleted, its common just to use a Dorman drain plug (m14 x 1.5) to remove the pressure relief valve entirely. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. The engine also had 799 or 243 casting heads which are closely related to the LS6. Our 2013 yukon with 47k miles just failed. 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? Help appreciated. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. This new lawsuit is essentially identical to the previous. [] 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.