gm cylinder deactivation problems

I got the AMF disabler anyway and so far so good. 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 a 12 with 4.8 Silverado 75000 miles Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. HELP, I have 2005 envoy that runs makes lifter noise then dies in about 30 seconds then I started it one day and it ran with little noise for 5 min started next day and it starts and dies again got heads off was told I could put ls 3 lifters in is that true or is there something else I could do thanks Duane. So now at 168 thousand miles it still runs good but gets bad gass mileage. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. Keith, were happy to help. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. Oil 0w or 5w -20 [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes Install ls3 valley cover. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. yep, you are 100% Right, I called a local saab shop and they filled me in, in 2005 the trailblazer and clones have DOD (displacement on demand), My next issue is getting extra ignition keys on the cheap. Nine plaintiffs filed the General . Found that all passenger side cylinders are not firing. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? I have been assuming this is just a slow to pump-up lifter or lifters. 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. Still have no power. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. 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. I can tell you for the past 2 years I changed out my LC9 5.3L fully synthetic oil every 3,000, even though Mobile Oil claims 10,000 miles or more. 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? 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. 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. This lowers the cost of building it [], [] aluminum block engine. This happened on a camping trip with my kids last friday night. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? It came back on last Wednesday starting with a flash. 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. Any problems to watch out for?Did you replace the VLOM? 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 . Pod. The Definitive Guide to LS Engine Specs and LS Engine Upgrades, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance - OnAllCylinders, LS Engine Bore & Stroke Chart - OnAllCylinders, http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc, Range Active Fuel Management Disable Device, LS9 6.2L Engine Upgrade Guide: Expert Advice for LS9 Mods to Maximize Performance - OnAllCylinders, LMG 5.3L Engine Upgrade Guide: Expert Advice for LMG Mods to Maximize Performance - OnAllCylinders, L59 5.3L Engine Upgrade Guide: Expert Advice for L59 Mods to Maximize Performance - OnAllCylinders, L76 Car Engine Upgrade Guide: Expert Advice for L76 Car Engine Mods to Maximize Performance - OnAllCylinders, LH8 5.3L Engine Upgrade Guide: Expert Advice for L20 Engine Mods to Maximize Performance - OnAllCylinders, LH6 5.3L Engine Upgrade Guide: Expert Advice for LH6 Engine Mods to Maximize Performance - OnAllCylinders, LFA 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders, LFA 6.0L Engine Upgrade Guide: Expert Advice for LFA Engine Mods to Maximize Performance - OnAllCylinders, LZ1 6.0L Engine Upgrade Guide: Expert Advice for LZ1 Engine Mods to Maximize Performance - OnAllCylinders, What the New LT2 Mid-Engine Corvette Reveals About the Future of GM LT Engines, All the Torques: How Summit Pro LS Truck Camshafts Help Truck Owners Maximize Performance, LMF 5.3L Engine Upgrade Guide: Expert Advice for LMF Mods to Maximize Performance - OnAllCylinders, L98 6.0L Engine Upgrade Guide: Expert Advice for L98 Mods to Maximize Performance, LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance - OnAllCylinders, Range AFM Disabler Reviews | Range Technology AFM Disabler 2019, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance, LM7 5.3L Engine Upgrade Guide: Expert Advice for LM7 Mods to Maximize Performance, LS4 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L76 6.0L Car Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L96 6.0L Engine Upgrade Guide: Expert Advice for L96 Mods to Maximize Performance, LC9 5.3L Engine Upgrade Guide: Expert Advice for LC9 Mods to Maximize Performance, LH6 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, LZ1 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, Chevy 4.3L Vortec Common Engine Problems - Vortec 4300 V6, https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-…, The 5 Most Common Chevy EcoTec3 5.3L Engine Problems, Chevy 6.0L Vortec Engine Problems - Common Vortec 6000 Problems, The 4 Most Common Chevy EcoTec3 6.2L Engine Problems, Gen 3 vs. Gen 4 LS Engines: How to ID Them (Video), Ask Away with Jeff Smith: Upgrades to GM LS 6.0L 4x4, LM4 5.3L Engine Upgrade Guide: Expert Advice for LM4 Mods to Maximize Performance, L33 5.3L Engine Upgrade Guide: Expert Advice for L33 Mods to Maximize Performance, Mailbag: Choosing an Engine Management System for an LS-Swapped '82 Olds Cutlass. , Production date on the vehicle is 04/2006 oddly enough. I can literally drive from Seattle to Redding CA on one tank. If you are using VVT, you could use the NAL-12612273 (L92) cam. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. GM uses 3 different styles all are engine specific. Junk . I dont know where to being to look for the problem. This is what I keep telling people. There are a few potential causes for Chevy cylinder deactivation problems, including oil consumption problems, harmful to the environment, sludge issues, and lower cylinder temperatures. Now Im here tring to figure out what to do. Can you tell me what needs to be done with the VVT? Engine oil pressure is fine. AFM - active fuel management strategy which deactivates the lifters on specific . [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? 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. Run it and let it soak overnight. 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. misfire or anything. I drive the same 320 mile trip every two weeks and drive the same route and full tank. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. Because its not just GM that have engine problems. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. please respond with your opinion. Its ribbed with solenoids on the underside. When you eliminate the AFM system, the extra oil is no longer needed. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. 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. Thanks. I plan on getting a tuner to disable the AFM. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. Fortunately I received a reducing in house shop hourly rate. Regarding the cylinder deactivation impact on fuel consumption . 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. What was happening to the first is slowly (or quickly in your case) happening to the others. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. Is there any potential down-side to doing this in other words, might this do more harm than good? I only had 81k on the motor. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. If I had been able to push the issue and get the time, I would have done the full fix at first without the hassle. Brian, I have the same question as Scott. i just bought a 2018 Silverado with the 5.3 Just recently, GM announced a temporary closure. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . I know I felt the same way. The engine also had 799 or 243 casting heads which are closely related to the LS6. 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). Everything was fine for two weeks, ow customer complains s it same noise it made as before. It is currently at the dealer having a new long block installed under warranty. 2 15 with 5.3 Sierras both with 100k and This new lawsuit is essentially identical to the previous. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. With the AFM tuned off, it shouldnt be trying to switch over to four cylinder mode. Number 7 cylinder lifters stops moving when truck starts. I am hoping this does the trick. If you dont have VVT, you could use part number NAL-12561721 (LQ9) along with a 4-pole 3-bolt 2005 Corvette cam sprocket p/n NAL-12586481 to make it compatible with your ECM. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. 8000 grand for the repair mine was 1,700.00 to repair, I had a 2004 small block v8(4.8) 331,000 miles on the truck,it was the usual on the maintenance front axles,etc. The detergent. It has AMF. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. bought at Brian Tooley Racing ! The engine has flex-fuel capability. Verified over hundreds of trips, makes no sense. The original version sprayed oil on the cylinder walls and increased oil consumption. Loved the looks and interior and thought a I got a great deal at $6k even. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. Thank you again for the response. I am wondering the same thing. RANGE TECNOLOGY.COM. Yes a poor design but a flaw ? Also putting in a new transmission vs. rebuilding. My 5.3 has a vin code of O. 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. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. Its got a hundred forty-five thousand miles on it. 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. The only solution is to replace the entire cylinder head. 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. Just shut AFM off. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. 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? While the system sounded good, the microprocessors scrambled to activate, deactivate, and then reactivate cylinders as driving conditions quickly changed, causing the car to hesitate, buck, and stall. This is my project car and will be my drive (about 5000 miles a year). On the AFM lifters that dosnt work i have installed them With the oil hole Down! The lifter seems to recharge whenever the truck sits for some time. This reduces expense when you build it [], [] intake, and a cable-driven throttle body, plus Im also installing Trick Flows VVT and AFM delete kits. You can monitor the oil level on your dipstick for 3,000 miles to determine if the deflector or plug would be needed, but chances are you wont based on the TSB. The only problem is the extra spray on the cylinder models if a deflector isnt used and this can show up as increased oil consumption. 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. They took the engine down today found so much damage inside they ordered a new engine from Detroit. Ive heard the Brand name Range thrown around in other forums, This is how mine started outthen 6 months later on the highway the service stabilitrak light and flashing engine light came on. I am trying to prevent same issue. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. 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. Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. This is in response to pretty much everyone. Why cant u just unplug the solenoid on back of engine by oil pressure sensor? When I first bought my newer truck with fuel management, the GM tech at the dealership told me; if I wanted the engine to live a long life keep the RPMs below 4500. I recently bought a 2018 Silverado 5.3L with AFM. Should I wait until the warranty runs out, or will that be too late to stop possible damage? Thanks for the advice Brian! No clue what to do. Now I get 24 to 26 with deactivation locked out and full power. Engine starts but is throwing a misfire on cyls 4,7. One the other hand, it came without AFM, VVT, or flex fuel capability. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? The engine will switch to operating on fewer cylinders when cruising at a constant speed. Whats the next step? Any truth to that? Todays computers are faster so it does work. It only has about 9k miles on it. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. The 2016+ Tacomas are junk. Another option is to plug it entirely if the AFM is already removed. As the problem gets worse, youll hear a lifter tick and eventually you may see clearance between the pushrod and the rocker which will quickly destroy the cam. I hate it. I always have done my oil changes on time, not sure about the people who owned it before me though. Most of all, my concern is reliability. . Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? This system is the most effective way to disable AFM. You could also have tried that if the trans oil didnt work. what deleter (if thats a real word) have you heard good things about. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. I have had some say that it is the valves and others say that it is the cats plugged. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. A tuner can often fix that as well by giving it some more ignition advance in these regions. 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? Send response to tkrieg@cox.net. 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.

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