gm cylinder deactivation problems

Cylinder misfires (most common sign) Rough idling, poor acceleration, loss of power Check engine light with engine misfire codes Air-to-fuel ratios are either running rich or lean The easiest way to tell that you have an injector problem is through the check engine light and engine codes for misfires. I had one fail and it chattered the cam to the point that I had to Install a new cam. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. I went with the new motor for the warranty. The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Their tech guys have seen it all and may have some thoughts on this as well. Covers me to 100K. 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). I dont know where to being to look for the problem. If you installed a performance cam intended for a car, it may be bleeding off some low end compression. Have not had a problem yet. I have a 2011 GMC with over 162,000 miles on it and it runs great! I want to put a AFM disabler in it what all do I need to have done. I did noticed the oil consumption but it was rare that I would have to add oil. 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. My Wifes 17 Buick with afm was my attempt to get back to gm. Most of all, my concern is reliability. . Very expensive repair too! In other words, the crankshaft and bearings were not visible. Next day, fired it up to take the the junk yard and it ran great. I sold them when they were new. Any help would be appreciated. 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. Brian, I still get a P0336 code every once in a while but still good to drive around town. 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 . After all we bailed them out of bankruptcy. 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? Truck ran fine before that. It also mentions a valve cover replacement with revised PCV valve design. 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??? The exhaust valve remains open during the intake stroke and closes just before BDC. [], [] as the LS engine familys hybrid engine in trucks and SUVs. This should be added to your earlier model if you experience oil consumption. When cruising on the freeway (for example) in 4 cylinder mode and jumping on the throttle to pass or get out in the fast lane, there is CONSIDERABLE and annoying and dangerous lag, like 3 seconds, and this is a problem. Then it takes out the lifter again and again until you bite the bullet and replace the cam. Still have no power. No other V-8 truck of similar weight can do that (except another GM with AFM). No clue what to do. Glad I did. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . hi brian when you replace the lifters do you have to change the guides also? 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. Ditto , never buy a throw away vehicle again is my recommendation and my fix . "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. The detergent. Install ls3 valley cover. If I had wanted a 4 banger I would have bought one. changed oil , its all working now, but want to disable this sorry system. 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. With the nipple, or without? If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. Thank you for your time. Question i just bought a 2005 Saab 9-7 with 5.3 v8, (same as GMC envoy) which came with AFM, the car runs fine, so if i just install the OBDII electronic device, is it just as likely that my lifters will still go bad? [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. I have a 12 wit 4.8 Silverado 75000 miles GM offers the following diagnostic steps in determining if this is the problem. Loved the looks and interior and thought a I got a great deal at $6k even. has 92,000 miles and was just told I have cam and lifter failure. For fun, he runs his 427-powered C5 Z06 in ECTA land-speed racing, at OPTIMA street car events, and at a mix of autocross, drag racing, and track days. I got the AMF disabler anyway and so far so good. He used seafoam and changed to synthetic oil. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. 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. Why would GM ever produce such problems with such little to gain. 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 didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. My fear now is not will it happen but when! I have read synthetic isnt good for AFM lifters. I have a 2013 1500 with the LC9. [], [] 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. They dont so any better than domestics on mpgs. I always have done my oil changes on time, not sure about the people who owned it before me though. Im a little confused on the problems too, Im reading that the 2007 pick-ups with 5.3 really had bad oil consumption and plug fouling problems, but is the 2005 5.3 that came in the trailblazers, envoys, and sabb 9-7s the exact same design as these pick-ups and prone to the same failures? Do you think I can still disable AFM? Any truth to that? I had the same issue and had to have the AFM information deleted from the computer and the car tuned. I loved this rtuck until this happened!! Batten, followed by several years developing performance pistons at Wiseco Piston Co. Today, Brian develops performance parts for Summit Racing Equipment and is a regular OnAllCylinders contributor. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. 2 15 with 5.3 Sierras both with 100k and Any thoughts or suggestions would be appreciated. Cylinder deactivation works to save fuel, but it may not be for the reasons you think. It is also known as Displacement on Demand (DoD) or cylinder deactivation. Do not pay that amount. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. Both #6 lifters only move when turning engine by hand, if you use the starter they stop moving. Have an intake and Borla exhaust. Shame 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. 50,000 miles. Carbon Build-Up in the Intake Ports. At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. I am trying to find out of this is true. Mine did at the exact same time. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. He stated if I continued to exceed 4500 RPM it would blow the lifters out. On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . 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. Had similar problems under warranty, no telling what they rigged me up with at the dealer. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. the extra oil isnt needed. So I researched and got an AFM disabler. 1. But not sure very annoying. The dealer in Rockhill, SC when asked only said they had not had a problem. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. The trucks are only supposed to use two four. My daughters car had about 230,000 miles when she complained of the problem. Most of the complaints show up in the 2009 to 2011 model years. Engine starts but is throwing a misfire on cyls 4,7. Hopefully he can free up the stuck/collapsed lifter. Number 7 cylinder lifters stops moving when truck starts. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] Now Im here tring to figure out what to do. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. 2015 SILVERADO 1500 44 crew cab with 5.3L engine: So two weeks ago with approx 70K miles, I had an odd noise when accelerating and then engine light flashing and riding rough. But then she passed away from cancer. 190k on the motor always ran AMSOIL full synth since new. Once the failure has occurred, the AFM shut off methods other than that probably wont work. 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 no clue what to do now. Please report back if you have any issues, but I think you are in good shape. You were lucky that it worked. I have had some say that it is the valves and others say that it is the cats plugged. The cost of just rings $4,000.00, [] Disable your Chevy AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] like front timing cover, knock sensor location, cylinder head style (cathedral ports), AFM (Active Fuel Management), and other components are key clues to which engine family youre looking []. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? (Bought car 1 day before lifter died!) We believe this confirmed that the AFM has never been operating in this vehicle. Install an AFM Delete Kit Cylinders two, three, and eight are all similar in cylinder deactivation. Thats not all bad because it saves the cost of an AFM delete kit. Just shut AFM off. is it still working good since you have done that with the trans fluid? GM uses 3 different styles all are engine specific. bought at Brian Tooley Racing ! I plan on getting a tuner to disable the AFM. Truck has an active P0300 code and runs very rough. 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. I am having that done today on my 08 Suburban and its only costing me $225. 1981 Cadillac V 864. It has the orings in place, that seals the towers. 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. Toyota has their own problems. . In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. Remembered that after I bought my Tahoe. so the trans fluid worked for you then? Put an S&B cold air intake on last week with huge oiled filter and it made a big improvement in throttle response and it appears possibly a slight improvement in mileage. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. Drives way better for my mostly paved road driving. Took the heads off again. The engine will switch to operating on fewer cylinders when cruising at a constant speed. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. Chris, when you did your delete, did you also change the cam at the same time? Definitely dont want to do anything to fix one problem and create another. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? Brian, I have been reading your article about the AFM. (Non-AFM engines have a smooth cover.). 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. I am confused about the plug in disabler. 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? . Found that all passenger side cylinders are not firing. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). General Motors has issued a service update for 2021 model year full-size truck and SUV models that are being shipped to dealerships and may be affected by valve lifter problems. I will be installing the AFM deactivator tonight when I get hoe. 4,7 plugs foul runs rough at idle. I call it active obama fuel management .A scam . Given that, would you recommend buying one of the OBD-II devices to disable AFM? I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor. any help? There is a good chance that some of the drivers side lifters decided to go. Constant engine and transmission problems. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. 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 ! [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. The most common are fuel pump failure, transfer case sensor failure, fuel injector failure, and carbon build-up. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. I noticed this discussion mainly addresses Chevy Silverados and other trucks? The problem:. I recently bought a low mileage 2013 Silverado and the lifters collapsed. I tried the trans fluid in the oil. 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. The original version sprayed oil on the cylinder walls and increased oil consumption. 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. The older truck gets 19 mpg the newer truck with fuel management gets 14. The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. A tuner can often fix that as well by giving it some more ignition advance in these regions. , Production date on the vehicle is 04/2006 oddly enough. Absolutely agree, but we all know GM cant afford to recall them all & definitely wont, gettin a Toyota, but first will go to GM dealer and ask to see a truck without AFM & when they say they dont have it Ill say See ya, I have an appointment with the Toyota dealer! Always had GMs never anything else till now. It was good for about 10 miles and started with same loud knock noise. She drove it for another 35,000 and it went out again. Fortunately, the old engine hadnt been shipped back to the remanufacturer. She had driven it for a couple of months that way. This system was originally used in early 1980s Cadillacs. 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. Can you tell me what needs to be done with the VVT? When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. Then again, it should have never been controlling those solenoids. I have a shop 39 yrs . The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM Thanks for your help. I ordered a electronic disabler for it today. Every one of these engine will have a lifter fail, this is a travesty! If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. I guess I might have to call a dealership or GM to get a definite answer on this one. There are so many more oil passages on engines these days. 330-630-0240. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. How is that an improvement. The biggest problem is nobody changes their oil on time. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. Would you get enough power to drive at freeway speeds? It will show up as a misfire code in a cylinders 1,4,6, or 7. This video covers the steps youll need to take before upgrading to a larger [], I am installing a complete delete system, just wondering what it will do if dont plug the oil pressure relief valve? I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? Anyway that horrible experiment was in the late 70s early 80s along with those converted Diesel engines..those like the 8-6-4 nonsense were just terrible failures. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. It's been an issue for a while but I've been getting past it by turning the key only to the off position instead of all the way back to "lock". I just did the delete and replaced the cam as well. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. 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. Since no air can get in or out, four cylinders provide no power. Here's what you need to know: 1. Lost number four When you don't need the full power of the engine, it provides better fuel economy." I contacted service manager in Gastonia, NC and he was kind enough to tell me the whole history of the problem.. EPA required better fuel mileage and less emissions and GM, Ford and Honda(V-6) came up with this failed AFM system. If buying a tuner/chip which works best for that truck/engine? Whats the next step? Basically rebuilt most of the engine while in the vehicle. Toyota will be my next truck unless GM owns up and makes wright with consumers. If thats the case, Summit Racing has dedicated truck cams that will increase power through the rangebottom to topbut the meat of it is in the mid-range where your engine spends the most time. I havent has any lifter or cam issues. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. If the lifter actually fails so that the mechanism wont release, it wont work. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. Now the problems back, I have 180k miles on it now. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. Its job is to direct the flow of pressurized engine oil to the active fuel management intake and exhaust valve . Love the truck. 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. 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. 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). Cylinder Deactivation to the Rescue. Told her that it would not last and that she needed to find a different way to get around. NOTE:If you were in a situation where youve installed the AFM delete kit, but dont have access to a programmera disabler can still be a viable option. I guess they also went to aluminum blocks in 2007, not sure if that has anything to do with this issues thanks for the advice! [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). 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 []. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. 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? Stopped at nearest gas station and found I was a quart low on oiladded oil and lights eventually went off and luckily we made it the 5 hour drive home. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. Most will want to get rid of the AFM immediately and VVT isnt for []. Verified over hundreds of trips, makes no sense. 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? I cant really tell from driving. 2 15 with 5.3 Sierras both with 100k and Would never take it on a long trip. 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 just bought a 2018 Silverado. A V8 firing all 8 cylinders sees 90 degrees between combustion events, while a 4 cylinder engine lengthens this to 180 degrees. I have a 2011 GMC Sierra 1500 with the 5.3. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. It replaces the AFM components with standard parts. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? Hello. I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! Dod is the biggest failure sence the 8-6-4 caddie in 1981. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. Open to suggestions about best course of action. How about if they just let us have a manual transmission agains for fuel mileage? Sylinder one lost compression on my 09 5,3. Bought an 07 GMC Yukon 5.3 with the AFM, 87k. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. Help appreciated. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. Accept i only have 60K on my truck and it hasnt recovered. Engines with AFM use a high-volume oil pump. They may be able to find some of those missing ponies. The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly. I dont plan on installing the delete kit at this time. It uses a M14 x 1.5 thread plug like Dorman 65217. 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.

V Drive Boats For Sale By Owner, Articles G