gm cylinder deactivation problems

Most will want to get rid of the AFM immediately. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? You were lucky that it worked. NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . Once the lifter has been damaged, the cam is probably also damaged. 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. Oil 0w or 5w -20 When you don't need the full power of the engine, it provides better fuel economy." I want to put a AFM disabler in it what all do I need to have done. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo If you just crack it without it starting it moves all the time . When they are locked into position, they wont wear further and cause issues down the road. chevrolet - How does cylinder deactivation work? - Motor Vehicle In four-cylinder mode, they act like air springs and allow for smooth operation. Plug the tuner into your GM vehicle's OBDII diagnostic port, and follow the instructions provided to update the engine control module's program The new program will make sure that AFM never engages. I am hoping this does the trick. The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active and Dynamic Fuel Management systems from dropping cylinders. Don't even get me started on the shortened life of the cooling, starting and charging systems. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. Chevy Silverado V8 To V4 Problems - Tools Bible 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. it is the regulator guy! I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. Also putting in a new transmission vs. rebuilding. I have successfully used a gadget that plugs into the ODBII. Vehicle has been serviced more regular than the manual calls for and the AFM has caused problem after problem with fouled plugs. Should I buy one to disable the V4 mode? [], [] 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. The problem I am facing is that I want to drive this vehicle for at lease another 77K and do not want to drive my vehicle with this AFM issue. Install ls3 valley cover. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Glad I did. 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! 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. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Chevy 5.3 Engine Problems Are They That Long-Lasting? - Motor Verso I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. Everything else looked good. I have 217,000+ on it and it never fails meever! It uses a M14 x 1.5 thread plug like Dorman 65217. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. I am a long time GM fan but after reading how they messed up the 5.3 ( I had a fantastic 2003 Z72 off road) Ill look else ware for my next vehicle. If I put my truck in manual 5, it doesnt try to go into V4 mode. Their tech guys have seen it all and may have some thoughts on this as well. I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. 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. The dealer in Rockhill, SC when asked only said they had not had a problem. If you are using VVT, you could use the NAL-12612273 (L92) cam. 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. How long did it take? Next day, fired it up to take the the junk yard and it ran great. I quites down to nothing after running for about a minute. Dont drive it if you have a dead cylinder due to afm failure. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. It seems this tough engine has everything incorporated into it. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? The older truck gets 19 mpg the newer truck with fuel management gets 14. I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? I told her to never pull the gadget out. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Engine starts but is throwing a misfire on cyls 4,7. GM's Active Fuel Management (AFM) works under certain light load driving conditions to maximize fuel economy by deactivating 4 of the engines 8 cylinders. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . 190k on the motor always ran AMSOIL full synth since new. The Tundra fares better but the frame has the rigidity of wet spaghetti and the 5.7 has had problems with VVT solenoids and the plastic timing chain tensioners. I have already dropped a lot of money on this truck (08 suburban). Brian, I have been reading your article about the AFM. the extra oil isnt needed. I ran 0W-20 no more the 5000 miles between changes. 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. [], [] as the LS engine familys hybrid engine in trucks and SUVs. It prevents the computer from switching over to four-cylinder mode.

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