As you said, the ECM was never seeing the AFM so I think youre good to go. It came back on last Wednesday starting with a flash. I have also heard that the oil pump is to be changed and I have also heard that it does not matter. Any guidance would surely be appreciated. Unfortunately, I found out about the lifters too late. It essentially turns your V8 engine into a V4 which saves fuel. thank You so much! 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. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. I want to put a AFM disabler in it what all do I need to have done. They have plastic casing, so you can imagine what will happen with aged plastic. Was thinking maybe I could trick the ruck into thinking the engine was not warmed up, however, this might cause some problems for other processes, such as mix ratio and timing. 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. I have a 07 Yukon with 180K and no issues what so ever. Pulled right valve cover an rockers on syl 6 dont move. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . It is usually first noticed during highway driving. If you installed a performance cam intended for a car, it may be bleeding off some low end compression. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Engine oil pressure is fine. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. 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? Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? Glad I did. The trucks are only supposed to use two four. 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. I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy TheAFMsystem can be identified by its components. They dont so any better than domestics on mpgs. Number 7 cylinder lifters stops moving when truck starts. Found that all passenger side cylinders are not firing. Now the problems back, I have 180k miles on it now. Since no air can get in or out, four cylinders provide no power. Now I get 24 to 26 with deactivation locked out and full power. Ketil, let us know what you find out. Still have no power. Its a CA EMMISIONS TRUCK. I have the towing package on my 13 Tahoe LTZ. The dealer in Rockhill, SC when asked only said they had not had a problem. According to some experts, switching to cylinder deactivation reduces the emissions high somewhere between 4 and 10%, which is a huge percentage of saving the air from pollution. If under the truck while parked and it is doing it it sounds like it is towards the back of motor. Loved the looks and interior and thought a I got a great deal at $6k even. Fortunately I received a reducing in house shop hourly rate. Disable the afm. The most common are fuel pump failure, transfer case sensor failure, fuel injector failure, and carbon build-up. It is a bad deal for sure.ive fixed a few best thing u can do is delete it in buy kit.no sense in fixing a flawed problem with the same flawed parts. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. I have a shop 39 yrs . Can you tell me what needs to be done with the VVT? A lot of drivers reported losing 2-4 quarts of oil in between oil changes. Verified over hundreds of trips, makes no sense. I ave noticed the point about excess oil spray. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. Wed recommend a call to our partners at Summit Racing. Does the disabler prevent the engine damage in the first place? [] 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 []. The motor I pulled was a 2007 LY5 with about 77k on it. We recently purchased an 08 Suburban and noticed some shuddering around crusing speeds, usually 45-55mph and highway speeds around 75mph. The GM 2.7-liter L3B Turbo four-cylinder engine for Chevy Silverado and GMC Sierra pickups is meant to change minds about power and torque in a small package. any help? Call chevy.They should being paying most of that. Also putting in a new transmission vs. rebuilding. You may want to update your post. When they are locked into position, they wont wear further and cause issues down the road. This new lawsuit is essentially identical to the previous. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. they are known to become plugged. This basically deactivates the cylinder deactivation system. At this state, a disabler would probably do what you need it to do. 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. 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. Junk . Constant engine and transmission problems. 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. whith a disabler. Can I (should I) also change to a standard volume oil pump? I read something the other day which I found to be funny. Are you saying that I am in the clear by a year and issues fixed? 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. What type of disabler did you go with? They lasted one year with big problems. Now I know why there wa such a push to get older ,less efficient vehicles off the roads. But after reading this thread, Im a little concerned about the long-term reliability. It has has 9000 miles and no lifter or other issues or codes so far. Having it fixed now, just curious Seems like a problematic design. Yes a poor design but a flaw ? AFM Sucks!!! I just got new warranty engine and dont want this issue again? Open to suggestions about best course of action. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. The result is improved combustion chamber pressure as the piston approaches top . GM should recall every vehicle with this terrible design flaw! I wear hearing aids, but I thought I heard more engine noises, but after checking the gas cap, the light went out for a week. I speak from some experience. I am confused about the plug in disabler. Its job is to direct the flow of pressurized engine oil to the active fuel management intake and exhaust valve . Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. Is the Pressure relief valve replaceable? AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. (Bought car 1 day before lifter died!) If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. What if I was able to trick the computer into thinking it is in 5th gear when it is actually in 6th? A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. Excess oil will be pushed out of the pressure relief valve into the oil pan. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. Looking to tear down myself. The original version sprayed oil on the cylinder walls and increased oil consumption. We believe this confirmed that the AFM has never been operating in this vehicle. RANGE TECNOLOGY.COM. I wii be using this truck to haul a camper for full time RV living and am thinking of a tuner to shut off AFM and maximize performance and economy. I dont know where to being to look for the problem. If I put my truck in manual 5, it doesnt try to go into V4 mode. 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. I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? Friend will send to me from Arizona. I know a few guys with Tundras. Looking forward to input from the forum, Thank you. Dont want to make a move on a new truck or jump to a 2500 yet. I would appreciate any feedback. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. Nine plaintiffs filed the General . 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. Thanks. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. You could also have tried that if the trans oil didnt work. Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. [] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. Its not GMs choice to use AFM. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). Battery was unplugged for a week.. We chickened out though and just bolted the AFM solenoid plate onto the used engine. 330-630-0240. 1981 Cadillac V 864. The computers had not evolved enough to control the sytem. Only running on drivers side cylinders. One alternative is to swap in one of the larger 6.0 non-AFM truck cams. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. My dad ended up running seafoam through it and some transmission fluid, changed the oil pressure sensor which I definitely think was bad and also cleaned out the little screen and he said it was so full of junk and metal scraps. It will show up as a misfire code in a cylinders 1,4,6, or 7. . Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? How about if they just let us have a manual transmission agains for fuel mileage? [], [] way. 50,000 miles. I did noticed the oil consumption but it was rare that I would have to add oil. He stated if I continued to exceed 4500 RPM it would blow the lifters out. [] 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. Never did strand me on the side of the road way. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. []. Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. hi brian when you replace the lifters do you have to change the guides also? Their tech guys have seen it all and may have some thoughts on this as well. Hi Mike, the metal shield you noticed is probably the windage tray. Only thing I noticed with the oil consumption issue. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. 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 []. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. Since it is not costing me anything out of pocket, I did not go with the Delete Kit (did not want to spend the money). [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes AFM - active fuel management strategy which deactivates the lifters on specific . With 40000 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. Took it to my dads and he tore things apart and found that I had a lifter that was stuck. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. Apparently all passkey III keys are not the same,, I bought one that said for 2006 impala assuming all pk3 would be the same, and I could not get it programmed in my saab 9-7,, so how Im waiting on ones that specially said for saab 9-7. hoping they will work. Everything else looked good. Dummy Me thought gm learned its lesson in 1981 but they never did and I Too am stuck with a Buick thats just waiting to self destruct. Please report back if you have any issues, but I think you are in good shape. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. Take a look at what bmw did in its R1250 bike. Im curious as to how much tran fluid you put in? My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. This is in response to pretty much everyone. Why would GM ever produce such problems with such little to gain. Truck has an active P0300 code and runs very rough. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did?

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