Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. 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. I call it active obama fuel management .A scam . Ayush Srivastava Another option is to plug it entirely if the AFM is already removed. 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. On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . 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. what deleter (if thats a real word) have you heard good things about. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. So now at 168 thousand miles it still runs good but gets bad gass mileage. Take a look at what bmw did in its R1250 bike. Wed recommend a call to our partners at Summit Racing. I have a 12 wit 4.8 Silverado 75000 miles We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? I will be installing the AFM deactivator tonight when I get hoe. Hopefully more is known by then. But it also restricts passages that the oil runs through. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. I am going to do the full repair of the engine now, but not an overhaul (too hard to get at the pan). I guess I might have to call a dealership or GM to get a definite answer on this one. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. $8500.00 fix. I recently bought a 2018 Silverado 5.3L with AFM. Oil 0w or 5w -20 Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. Next day, fired it up to take the the junk yard and it ran great. [], [] 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. I ordered a electronic disabler for it today. [] cherry on top is that it isnt saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. I just did the delete and replaced the cam as well. All ready done valve job . 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. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . 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. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. As you said, the ECM was never seeing the AFM so I think youre good to go. There has been a lifter noise since I bought the truck 1 year ago. Im confused from the write up about the plug in. Just one or two. Run it and let it soak overnight. What was happening to the first is slowly (or quickly in your case) happening to the others. any help? Last GM Ill ever buy unless its got a diesel. 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? What the biggest reported problem with Chevy Silverados? The only solution is to replace the entire cylinder head. Replaced all lifters on passenger side as well as pushrods for even wear. 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. Is this due to the AFM being shut off? Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. On June 4th you stated 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) I am looking at purchasing a 2012 Tahoe with the LMG per the build sheet. If the 4th cylinder lifter has failed, would driving it damage the engine? Send response to tkrieg@cox.net. I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] 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 []. Most of all, my concern is reliability. the extra oil isnt needed. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. . The oil pump is high volume, but there are a lot of people that dont change it and rely on the pressure valve to keep the volume manageable. Ive only put a straight pipe exhaust, intake, and a boost controller on it. 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. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. Would never take it on a long trip. Drives way better for my mostly paved road driving. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. Brian, thank you for the quick response. With 40000 When you drain the oil at three to four thousand miles its still clean. It was well researched and tested back in the late seventies and eighties . Any truth to that? Never did strand me on the side of the road way. 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. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. My local mechanic suggested whatever I buy with an AFM he will send off the ECU to have the AFM flashed out. 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. Was a disaster then but a profitable disaster. My point is that the engine likely on uses dod a small percentage of the time so can not really imagine that the delete causes any more issue than normal which may be the high oil consumption but do all of these engines with dod consume a lot of oil? Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. 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. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . This system was originally used in early 1980s Cadillacs. Ive been a Ford guy my whole life, so I was unaware of AFM until a recent trip where I did a lot of highway driving and happened to bring up the real-time mpg display, where I saw it switch between V6 and V4. She had driven it for a couple of months that way. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. I have a 2013 1500 with the LC9. It is currently at the dealer having a new long block installed under warranty. The detergent. She drove it for another 35,000 and it went out again. Hopefully he can free up the stuck/collapsed lifter. However, the fuel savings are not always as much as expected. Why this happens is a more . I hate it. Most will want to get rid of the AFM immediately. The write up confuses me. 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. 2 15 with 5.3 Sierras both with 100k and Then again, it should have never been controlling those solenoids. So I researched and got an AFM disabler. Definitely dont want to do anything to fix one problem and create another. I sold them when they were new. These trucks cost too much to have a terrible product. Disable the afm. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. But then she passed away from cancer. AFMlifters have a history of failing and oil consumption can be a problem. CHANGE YOUR OIL!!!!! If I put my truck in manual 5, it doesnt try to go into V4 mode. Love the truck. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. However, they are only functional on engines that usedAFM. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. Pod. But if you dont like it. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. 2 15 with 5.3 Sierras both with 100k and This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. Changing the sensor didnt help. AFMengines use special lifters for cylinders 1, 4, 6, and 7. 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. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. 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. Pushing forward. Pulled right valve cover an rockers on syl 6 dont move. Traded it with 180K miles and did not experience any problems. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. They layed over night in engine oil before instalation. Here's what you need to know: 1. The lifter seems to recharge whenever the truck sits for some time. But the problem at that time was the computer technology. Accept i only have 60K on my truck and it hasnt recovered. 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. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. 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. 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. (Bought car 1 day before lifter died!) []. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. I wont bother with blocking the relief valve. The dealer in Rockhill, SC when asked only said they had not had a problem. GM offers the following diagnostic steps in determining if this is the problem. Brian, I have been reading your article about the AFM. 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. 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. The engine is running on only four cylinders. Its a CA EMMISIONS TRUCK. They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. GM should recall every vehicle with this terrible design flaw! It has the orings in place, that seals the towers. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. 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. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. 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. "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. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . I have also heard that the oil pump is to be changed and I have also heard that it does not matter. Sylinder one lost compression on my 09 5,3. Todays computers are faster so it does work. Required fields are marked *. Welcome to socialism folks . Plugs spark fine engine has power at higher RPMs although it is still in Limp mode / stabilitrack message, even after driving it a few times above 60 MPH then clearing errors with handheld programmer. It uses a M14 x 1.5 thread plug like Dorman 65217. I have successfully used a gadget that plugs into the ODBII. You may want to update your post. Fortunately, the old engine hadnt been shipped back to the remanufacturer. Shame this happened. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Brian, Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . Yeh truck has 5237 miles on it I am trying to find out of this is true. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. GM switched over to the 4100 v-8 in 1982. Will the plug in deactivater fix the oil consumption or will it cause more consumption? Fortunately I received a reducing in house shop hourly rate. If you are using VVT, you could use the NAL-12612273 (L92) cam. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. 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. If someone didnt want to spend gas buy a Toyota. Just pulled it down in the garage there was no other damage , luckily. I was told that before I start the vehicle up I will need to have the AFM and VVT disabled in the ECU but that would require a custom tune from a tuner as the ECU cannot just be told that the AFM and the VVT is gone. With the AFM tuned off, it shouldnt be trying to switch over to four cylinder mode. 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. 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). As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. It does seem that when they start goingthey go quickly.

Phenols May Certain Rubber And Plastic Materials, Tetrick Funeral Home Obituaries, Manheim Township School District Staff Directory, Fortnite Drop Map Calculator, Articles G