Todays computers are faster so it does work.
GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority I have already dropped a lot of money on this truck (08 suburban). Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. What the biggest reported problem with Chevy Silverados? You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. If you installed a performance cam intended for a car, it may be bleeding off some low end compression. Did Obama make them do this? Just recently, GM announced a temporary closure. Have an intake and Borla exhaust. Install an AFM Delete Kit I have a 2013 1500 with the LC9. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. The biggest problem is nobody changes their oil on time. Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. stalled in a certain way a warning wouldn be a bad idea. Send response to tkrieg@cox.net. If a shop pulled a DTC code P0300 and found AFM to be the issue, it may not be too late to try the disabler. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. This is my second Avalanche and I never had any issues with either of them. I had privilege to work on some of that garbage they never did work . in your opinion will this work, i really dont see any reason it wouldnt. I cant really tell from driving. Have a lifter problem on my 2010 5.3 Silverado. how many miles do you have on your engine? I went with the new motor for the warranty. 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. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. 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. 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. With 44, its a enormous Jon to remove the oil pan. I have an 07 Yukon with over 180K. Love the truck so far. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. Or not because it is the cast iron block and not he aluminum block? The engine was not Flex Fuel (E85) capable and did not use Variable Valve Timing (VVT) [], [] TheL76like its LS2 siblingis a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks. Love the truck. Was a disaster then but a profitable disaster. Dod is the biggest failure sence the 8-6-4 caddie in 1981. There is no way cylinder deactivation and the resulting temperate decrease, with sudden piston heat expansion when all cylinders are engaged, can't have undo wear and tear on the rings, valves, piston and bore. He stated if I continued to exceed 4500 RPM it would blow the lifters out. Once the lifter has been damaged, the cam is probably also damaged. No problems with any to this point. I would rather stay a V8 full time than deal with AFM issues in the future. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? Then it takes out the lifter again and again until you bite the bullet and replace the cam. .
The Hit and Miss Nature of Cylinder Deactivation Systems Brian, we have a 2007 Yukon Denali in our shop with a 6.2L v-8 that has suffered a lifter failure with camshaft damage. So I researched and got an AFM disabler. im going to plug in a dissabler when im done to keep it V8 mode all the time. A 14 gmc 5.3 Sierra 85000 miles Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. Replace the cam or do the delete kit? The lifter seems to recharge whenever the truck sits for some time. has 92,000 miles and was just told I have cam and lifter failure. Dont want to make a move on a new truck or jump to a 2500 yet. 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). 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. Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. I would appreciate any feedback. Dont drive it if you have a dead cylinder due to afm failure. So for all of you that continue to complain about how bad these things are.
The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit 2 15 with 5.3 Sierras both with 100k and Battery was unplugged for a week.. On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . Everything else looked good. Logic says that it should not as the ECM isnt programmed to use AFM, but will it see a lack of resistance from no solenoid pack plugged in? I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. Cylinders two, three, and eight are all similar in cylinder deactivation. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. I have a 2011 Chevy Tahoe with the 5.3 Gen 4 LS (VIN Code 0) and I bought a CAM motion DOD/AFM delete kit, 3 bolt drop in CAM Motion stage 2 camshaft, VVT delete kit and finally a Diablo Predator 2 Premium for GM programmer.
I have a 12 with 4.8 Silverado 75000 miles if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . Both #6 lifters only move when turning engine by hand, if you use the starter they stop moving. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. Thanks for your help. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Gary, [] 3 engines didnt have AFM (Active Fuel Management) or VVT (Variable Valve Timing), so you dont have the expense of an AFM or VVT delete []. 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. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. All these comments on the 5.3 are blowing my mind!!!. 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 []. How about if they just let us have a manual transmission agains for fuel mileage? Once the failure has occurred, the AFM shut off methods other than that probably wont work. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? A 17 with 5.3. [] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. I have the towing package on my 13 Tahoe LTZ. CHANGE YOUR OIL!!!!! GM get a clue! Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. So I did the job one more time. 2018 new truck has me really disgusted If I had checked this out better, there would have been one less POS Chevy sold last year ! 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. Thats not all bad because it saves the cost of an AFM delete kit. I just did the delete and replaced the cam as well. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. Still have no power. GM should recall every vehicle with this terrible design flaw! Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? 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??? It seems this tough engine has everything incorporated into it. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. Im considering just replacing the 5.3 ( should be LMG, 2007 YUKON ) with the L96 crate engine. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. My daughters car had about 230,000 miles when she complained of the problem. Thats a tough call, if the warranty will cover itId let it run out. 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. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. (Bought car 1 day before lifter died!) Loved the looks and interior and thought a I got a great deal at $6k even. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. With 40000 Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? Excess oil will be pushed out of the pressure relief valve into the oil pan. If I put the Range module on, is that all I need to do, both now and long term? 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. 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 just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Better airflow reduces drag on the pistons and the associated pumping losses. Its a CA EMMISIONS TRUCK. Some guys have been able to use a tool through the top with the cover off to get it to release. Only wish Id did my homework, nothing but issues, from 14,000 miles it starts this motor noise,as if lifters at cold starts, let set up for 8 hrs same noise, this noise is on the right side of engine, it lasts 5 seconds but never heard this until we had this cold spell in the state low temperatures or it was just time for this to start?
Go Small? Common Problems With the Chevy Silverado 2.7L Turbo One alternative is to swap in one of the larger 6.0 non-AFM truck cams. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block.
GM Making New Trucks Without Cylinder Deactivation Due To Chip - Motor1 It came back on last Wednesday starting with a flash. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. 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. I hate it. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. With 40000 Your email address will not be published. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. They have plastic casing, so you can imagine what will happen with aged plastic. lol. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. I had one fail and it chattered the cam to the point that I had to Install a new cam. I noticed this discussion mainly addresses Chevy Silverados and other trucks? You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. I had a 2007 Yukon XL 5.3 with the AFM. I am leaning heavily on installing the AFM disabler. Don't even get me started on the shortened life of the cooling, starting and charging systems. How long did it take? do you fill to capacity anyways???? Are you saying that I am in the clear by a year and issues fixed? please respond with your opinion. Engine oil pressure is fine. A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. It does seem that when they start goingthey go quickly. Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. Truck has an active P0300 code and runs very rough. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. The 2016+ Tacomas are junk. I also have 08 Burb, but have different symptoms (high oil consumption, blue exhaust smoke at start, and now a really rough start after sitting overnight). 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. How did your turn out? Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. . I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. The Cylinder Deactivation system, known as the Active Fuel Management system by GM, shuts off some of the cylinders when extra power is not needed which improves fuel economy. Took it to my dads and he tore things apart and found that I had a lifter that was stuck.
Why does GM's cylinder deactivation cause lifter failure? But after reading this thread, Im a little concerned about the long-term reliability. I wont bother with blocking the relief valve. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. This allows the engine to run in V8 mode. Should I wait until the warranty runs out, or will that be too late to stop possible damage? AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage.
Active Fuel Management - Wikipedia The problem:. Ditto , never buy a throw away vehicle again is my recommendation and my fix . AFM - active fuel management strategy which deactivates the lifters on specific . 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. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. With that said, the current global chip shortage has been affecting the industry on a wide scale, forcing production halt among several automakers. Now I know why there wa such a push to get older ,less efficient vehicles off the roads. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. The oil collapses the plunger inside the lifter. I speak from some experience. With the nipple, or without? Hopefully more is known by then. They took the engine down today found so much damage inside they ordered a new engine from Detroit. 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? 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 all we bailed them out of bankruptcy. Just shut AFM off. We figured we already had the intake manifold off to install the engine, why run the risk of MIL only to have to removed the intake manifold again without being paid. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. All Gen IV engine blocks haveAFMtowers and oil passages cast in. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. 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. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. also in the pan is another AFM oil filter near the external engine oil filter. [], [] as the LS engine familys hybrid engine in trucks and SUVs. The dealer in Rockhill, SC when asked only said they had not had a problem. A custom tune by a knowledgeable tuner with access to a chassis dyno will pay a lot of other dividends other on top of turning off afm and VVT. No other V-8 truck of similar weight can do that (except another GM with AFM). Truck ran fine before that. My 5.3 has a vin code of O.
Disable Active Fuel Management - Ricks Free Auto Repair Advice 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? Now I get 24 to 26 with deactivation locked out and full power. Yes, always change all the lifters at once. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. Because your Saab is mechanically similar to the Trailblazer, wed suggest that you are correct and no changes need to be made to the relief valve. I have a 2011 GMC Sierra 1500 with the 5.3. Ayush Srivastava At this state, a disabler would probably do what you need it to do. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. 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. Most of all, my concern is reliability. My ignition lock cylinder is completely stuck in lock position with the steering wheel locked as well. I have 4 GMCs in my driveway right now only one with AFM its always popping DTCs, 06 Yukon (not AFM)never had a light in 12 years! They dont so any better than domestics on mpgs. Help appreciated. i have a 2007 suburban 6.0 and the number 4 intake lifter took a dive.i have already started to disassemble the engine as i plan on replacing all the lifters and reassemble the engine as i never had any other problems with it. I recently bought a low mileage 2013 Silverado and the lifters collapsed. will feel like a jerk asking the clerk at lowes to cut them again. Would installing the Disabler solve this? The collapsed lifters will not engage the pushrods and both valves remain closed.