They are taller and have special oil holes. Engine starts but is throwing a misfire on cyls 4,7. I have an 07 Yukon with over 180K. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? Love the truck so far. They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. 1. They replaced all the lifters, said no other damage, problem lifters were on cylinders 6 and 7. 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. Constant engine and transmission problems. The oil-pressure controlled system that operates the special lifters is VERY prone to failure, if the oil is not changed on time, OR if the wrong oil is used. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. Brian, thank you for the quick response. . Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? If I put my truck in manual 5, it doesnt try to go into V4 mode. 2014 Chevy, GMC Pickups Recalled For Cylinder-Deactivation Issue Brian, I have been reading your article about the AFM. Pulled the inntake and replaced valleypan With all the solenoids. Engines with AFM use a high-volume oil pump. Will the plug in deactivater fix the oil consumption or will it cause more consumption? You can unplug the sensor on the vacuum booster and it will fool the computer into thinking there is a high demand on the engine and shut down the AFM system but you will have a Check engine light in your face for doing so . Sylinder one lost compression on my 09 5,3. Now Im here tring to figure out what to do. Solenoids, new lifters also test voltage to solenoid pack all good their, This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. 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?? My Wifes 17 Buick with afm was my attempt to get back to gm. If you left the original cam in, the AFM cylinders will be down about 25 lbs. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. 4,7 plugs foul runs rough at idle. lol. The 2016+ Tacomas are junk. 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 []. 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 ignition lock cylinder is completely stuck in lock position with the steering wheel locked as well. The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly. I own a reputable repair shop. Pulled right valve cover an rockers on syl 6 dont move. Ive been reading, with disgust and concern of the lifter/cam situation. They took the engine down today found so much damage inside they ordered a new engine from Detroit. Battery was unplugged for a week.. Yes thats true. Cant believe they havent fixed this in a decade. Todays computers are faster so it does work. There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. Our 2013 yukon with 47k miles just failed. 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. These trucks cost too much to have a terrible product. All ready done valve job . The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . Thanks. Once the failure has occurred, the AFM shut off methods other than that probably wont work. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? There may be an ignition related issue on that cylinder. Sometimes it will do it all the time and other times can drive it for 10 miles and then it starts but doesnt do it constantly when driving. I am considering the same. Most of the complaints show up in the 2009 to 2011 model years. 5.3-liter Chevy Engine Problems: What Should You Look Out For? Next day, fired it up to take the the junk yard and it ran great. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. Any problems to watch out for?Did you replace the VLOM? Carbon Build-Up in the Intake Ports. Did not help. I couldnt agree with you less, yet I respect your opinions. We chickened out though and just bolted the AFM solenoid plate onto the used engine. I would rather stay a V8 full time than deal with AFM issues in the future. No problems with any to this point. Hello. Hello! It has AMF. Required fields are marked *. I ran 0W-20 no more the 5000 miles between changes. Now i have my mechanic trying to follow a YouTube video I saw with a guy and a rod and a hammer. The most common issue GM vehicle owners with AFM report is increased fuel consumption. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). One must anticipate this. NOT GOOD!! It does seem that when they start goingthey go quickly. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. Since no air can get in or out, four cylinders provide no power. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. [] they have a downside? 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! [], [] way. Ever since that which was Feb/March 2020 i get a intermittent rattle does not do it all the time and I am not getting any codes i.e. 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. It is replaceable.. just remove oil pan and it will be on top at the filter. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . What was happening to the first is slowly (or quickly in your case) happening to the others. If the 4th cylinder lifter has failed, would driving it damage the engine? In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. Whats the next step? The oil is baked on to every component. Im praying that my RangeTech buys me a few years. I have a 2011 GMC with over 162,000 miles on it and it runs great! So for all of you that continue to complain about how bad these things are. 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. Is there any reaction to the disabler when pulling a boat or trailer? With 40000 There are so many moving components in an engine these days as opposed to the past. []. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. I also notice that it doesnt go into V4 when it is cold. RANGE TECNOLOGY.COM. I have 217,000+ on it and it never fails meever! Disable the afm. But if you dont like it. Why this happens is a more . Have not had a problem yet. 1. You can reuse the original valley cover OR use a non-AFM valley cover, leave the harness connected, and tuck the solenoid pack away. Removing ignition lock cylinder when it won't turn at all With that said, the current global chip shortage has been affecting the industry on a wide scale, forcing production halt among several automakers. Covers me to 100K. When cylinders are deactivated, the number of crankshaft rotation increases between firing pulses. CHANGE YOUR OIL!!!!! Told her that it would not last and that she needed to find a different way to get around. A 17 with 5.3. If you ignore it and keep driving, odds are you will destroy the cam as well. What the biggest reported problem with Chevy Silverados? Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . We need availability of a replacement engine without the AFM. How to Delete or Disable Active Fuel Management (AFM) on GM Engines While it does still use the GM Active Fuel Management cylinder deactivation technology that caused a plethora of issues on the gen-four Vortec 5300 engines, it seems that GM has solved the issues related to excessive oil consumption. [] 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. How to Delete or Disable Active Fuel Management (AFM) Thanks. 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? Its Chrysler and Ford. If you swapped in a LS9 cam, you will find it makes good power at the very top, but its actually down from 5,000 rpm and lower where the truck spends the majority of its time. AFMengines use special lifters for cylinders 1, 4, 6, and 7. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. please respond with your opinion. What type of disabler did you go with? Been driving with no issues but I did notice that the AFM disabler removed a P0449 code (Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction) dont know if this is a coincidence or they are related??? I went with the new motor for the warranty. It was good for about 10 miles and started with same loud knock noise. Runs better than new now and no more oil consumpsion!! Should I buy one to disable the V4 mode? GM switched over to the 4100 v-8 in 1982. chevrolet - How does cylinder deactivation work? - Motor Vehicle Would doing the disabler option once I get it back be the right one? Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. 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. Basically rebuilt most of the engine while in the vehicle. GM Releases Valve Lifter Service Update For V8 Engines Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. 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. It could be the filter screen under the oil sending unit. Having a hard time finding one .. Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . Most will want to get rid of the AFM immediately. Once I get it back, could I install the Disabler safely. If someone didnt want to spend gas buy a Toyota. 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. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. they are known to become plugged. Help appreciated. I am having that done today on my 08 Suburban and its only costing me $225. Cylinder Deactivation to the Rescue. Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? If you already own this engine you will need to deactivate the AFM system or even better DO NOT buy any GM vehicle with this engine. They lasted one year with big problems. 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 only had 81k on the motor. 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. Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. I have a 2013 1500 with the LC9. Should I wait until the warranty runs out, or will that be too late to stop possible damage? What type of ODBII gadget did you use? Any thoughts or suggestions would be appreciated. [], [] 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. Have a lifter problem on my 2010 5.3 Silverado. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. I may just do that Vic. (Non-AFM engines have a smooth cover.). The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. bought at Brian Tooley Racing ! Any guidance would surely be appreciated. NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. Why would GM ever produce such problems with such little to gain. The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit There are no changes in the valves or the springs. It has the orings in place, that seals the towers. Nine plaintiffs filed the General . 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. . The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. 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.
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Sam Quek Twin Brother, Eli Saslow Four Good Days Washington Post, Articles G