I ave noticed the point about excess oil spray. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. Thanks for the detailed post! [] For more information on AFM, including a comprehensive guide on how to completely remove it from your engine, check out this article. 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. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. They lasted one year with big problems. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. I have a 12 with 4.8 Silverado 75000 miles What the biggest reported problem with Chevy Silverados? 1. The computers had not evolved enough to control the sytem. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. I am hoping this does the trick. It replaces the AFM components with standard parts. 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??? AFMengines use special lifters for cylinders 1, 4, 6, and 7. . We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? How to Fix GM's Cylinder Deactivation Problems I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. Is Your 5.3L V8 Engine Eating Up Too Much Oil? We - GM Parts Online , Production date on the vehicle is 04/2006 oddly enough. The older truck gets 19 mpg the newer truck with fuel management gets 14. Replace the cam or do the delete kit? stalled in a certain way a warning wouldn be a bad idea. changed oil , its all working now, but want to disable this sorry system. AFM - active fuel management strategy which deactivates the lifters on specific . This should be added to your earlier model if you experience oil consumption. A tuner can often fix that as well by giving it some more ignition advance in these regions. How to Delete or Disable Active Fuel Management (AFM) on GM Engines All New lifters were from AC delco. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM Most of the complaints show up in the 2009 to 2011 model years. In the mean-time I found that you can keep the engine from going into 4 cyl mode by using the manual shift (if so equipped) and keeping it out of 6th gear. Would installing the Disabler solve this? GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. 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 []. I have a 12 wit 4.8 Silverado 75000 miles 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). The lifter seems to recharge whenever the truck sits for some time. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. 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. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. 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. I recently bought a low mileage 2013 Silverado and the lifters collapsed. Junk . The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. There has been a lifter noise since I bought the truck 1 year ago. I would. All these comments on the 5.3 are blowing my mind!!!. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? GM Making New Trucks Without Cylinder Deactivation Due To Chip - Motor1 Are there errors or something only the dealer can clear? I just bought a 2018 Silverado. The problem:. On the AFM lifters that dosnt work i have installed them With the oil hole Down! Help appreciated. GM offers the following diagnostic steps in determining if this is the problem. Constant engine and transmission problems. This is my project car and will be my drive (about 5000 miles a year). Run it and let it soak overnight. 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. I have a 2014 Silverado with a 5-3. I am trying to prevent same issue. Does the Pressure relief vavle ever go bad?? If under the truck while parked and it is doing it it sounds like it is towards the back of motor. You will get codes thrown if the afm is physically removed without telling the ECM you did so. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. Truck ran fine before that. I had one fail and it chattered the cam to the point that I had to Install a new cam. GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority Then changed the oil. what deleter (if thats a real word) have you heard good things about. I wii be using this truck to haul a camper for full time RV living and am thinking of a tuner to shut off AFM and maximize performance and economy. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. 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. Since the tranny oil worked, you should now change the oil, right? It is usually first noticed during highway driving. Ive been reading, with disgust and concern of the lifter/cam situation. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. I have also heard that the oil pump is to be changed and I have also heard that it does not matter. The engine has flex-fuel capability. I just took a long trip and it used 1.5 quarts of oil. Thank you again for the response. It is also known as Displacement on Demand (DoD) or cylinder deactivation. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. Disable Active Fuel Management - Ricks Free Auto Repair Advice When you don't need the full power of the engine, it provides better fuel economy." I hate it. I tried the trans fluid in the oil. It actavated the lifter? 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. Unplugged AFM engine only runs on 4 cylinders #2,3,5 and 8. A 17 with 5.3. Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. But it also restricts passages that the oil runs through. CAM motion says no just have to disable the AFM and VVT with a stock tune as the camshaft is not an aggressive camshaft but a drop in. What would you do if you were in my situation? It has the orings in place, that seals the towers. He used seafoam and changed to synthetic oil. Was a disaster then but a profitable disaster. What was happening to the first is slowly (or quickly in your case) happening to the others. Driver reported this occurred suddenly while driving down the highway. 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. How did your turn out? Have an intake and Borla exhaust. Once I get it back, could I install the Disabler safely. The engine is running on only four cylinders. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. If the lifter actually fails so that the mechanism wont release, it wont work. It has AMF. No it runs fine on sylinder one but not on 6 or 7!!! Cylinders two, three, and eight are all similar in cylinder deactivation. Have a lifter problem on my 2010 5.3 Silverado. 2014 Chevy, GMC Pickups Recalled For Cylinder-Deactivation Issue He unstuck it and I took it for a drive and same thing happened. Replaced all lifters on passenger side as well as pushrods for even wear. AFMlifters have a history of failing and oil consumption can be a problem. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? [] cherry on top is that it isnt saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. All Gen IV engine blocks haveAFMtowers and oil passages cast in. 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. I am wondering the same thing. Would you get enough power to drive at freeway speeds? In four-cylinder mode, they act like air springs and allow for smooth operation. Deactivating cylinders at light load forces the throttle valve be opened more fully to create constant power, and allows the engine to breathe easier. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . 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? No problems with any to this point. . Id wait until the warranty expires then disable. It is currently at the dealer having a new long block installed under warranty. Required fields are marked *. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. I told her to never pull the gadget out. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. This is my second Avalanche and I never had any issues with either of them. Have misfire code and engine has what I would call a surge while driving. It also mentions a valve cover replacement with revised PCV valve design. Problems regarding Chevy 5.3L engines ticking noise and misfire. I dont plan on installing the delete kit at this time. Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . 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. It does seem that when they start goingthey go quickly. I loved this rtuck until this happened!! Yesterday my motor (116,000 miles) felt like it went into limp mode when decelerating from 8 cyl to 4 cyl but it recovered.This is the second time that this has happened in 6 months so I think that I am on the slope. Brian, I have the same question as Scott. They are taller and have special oil holes. The car runs great apart from the shuddering at those speeds. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. 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. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). The Hit and Miss Nature of Cylinder Deactivation Systems If you just crack it without it starting it moves all the time . 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. We were getting a code that the cam position sensor was not functioning properly. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. No movement on the rocker arms. Another General Motors 5.3L V8 Lawsuit Filed | GM Authority Should I wait until the warranty runs out, or will that be too late to stop possible damage? A 14 gmc 5.3 Sierra 85000 miles Billy, there is some interesting trivia here on the L92. This basically deactivates the cylinder deactivation system. 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 currently get 8 mpg with the vortec 350 and a 4l60, I have a 99 Sub k1500 that i get 16 to 18 hwy loaded lightly, I get about 14 on my 95 Tahoe 2 door with 5.7 and 4l60. Dale, I have a 08 Tahoe thats doing the same thing.Any info you have on this would be appreciated, [] Do they have a downside? Its Chrysler and Ford. Would doing the disabler option once I get it back be the right one? I have 217,000+ on it and it never fails meever! 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. The detergent. Im always sorry to hear when people run into issues like these. My question on a 2007 Chevy Tahoe 5.3 AFM So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! If the 4th cylinder lifter has failed, would driving it damage the engine? is it still working good since you have done that with the trans fluid? Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo Who knew? 5.3-liter Chevy Engine Problems: What Should You Look Out For? If you think GM pioneered cylinder deactivation, guess again AFM/DFM Disabler - Range Technology I cant really tell from driving. I wont bother with blocking the relief valve. Very confusing stuff out there. I want to put a AFM disabler in it what all do I need to have done. 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. Chris, when you did your delete, did you also change the cam at the same time? Is the Pressure relief valve replaceable? I have had some say that it is the valves and others say that it is the cats plugged. I guess I might have to call a dealership or GM to get a definite answer on this one. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. Battery was unplugged for a week.. Because its not just GM that have engine problems. We chickened out though and just bolted the AFM solenoid plate onto the used engine. Never did strand me on the side of the road way. 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. She started to have the lifter problem again after 60,000 miles more. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. I saw two Summit Racing kits, with different valley coverswhich one do I need for my Yukon? Then had to drive the truck back to Tampa from Cheifland Fl. Not sure which direction to go from here. The oil is baked on to every component. I just did the delete and replaced the cam as well. 190k on the motor always ran AMSOIL full synth since new. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Perhaps a flaw by design would be a more appropriate description . Just one or two. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. One the other hand, it came without AFM, VVT, or flex fuel capability. I have read synthetic isnt good for AFM lifters. We need availability of a replacement engine without the AFM. 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. Loved the looks and interior and thought a I got a great deal at $6k even. I have ordered an ATM disabler and will be putting a can of Textron in the gas at the next fill up. GM claims fuel improvements ranging from 5%-15% depending on the engine. The engine had 200K miles. It is being covered under warranty since I only have 72,000 miles on it. CHANGE YOUR OIL!!!!! 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? If you want to delete it entirely, its a M14 x 1.5 pipe plug or you could use the Improved Racing plug p/n IRP-814-M14-Kit. I recently bought a 2018 Silverado 5.3L with AFM. I would just have the AFM disabled (tuned out) then. That inherently less smooth operation requires additional NVH dampening. But if you dont like it. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. 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. It could be the filter screen under the oil sending unit. Brian, thank you for the quick response. 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. With 44, its a enormous Jon to remove the oil pan. They dont so any better than domestics on mpgs. Its a CA EMMISIONS TRUCK. Your email address will not be published. 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! AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. Most will want to get rid of the AFM immediately. Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? I did noticed the oil consumption but it was rare that I would have to add oil. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. I have an 07 Yukon with 230k on the engine. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. They layed over night in engine oil before instalation. do you fill to capacity anyways???? 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. Does the disabler prevent the engine damage in the first place? 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. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. With 40000 Diablo says yes but they do not provide tunes. The most common issue GM vehicle owners with AFM report is increased fuel consumption. TheAFMcylinders are opposite of one another in the firing order. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). Hi Grant is that disabler still working for you ? Only thing I noticed with the oil consumption issue. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . Better airflow reduces drag on the pistons and the associated pumping losses. Everything was fine for two weeks, ow customer complains s it same noise it made as before.
Dominator Hoop Promo Code,
Fuzenet Technical Support,
Articles G
