You cannot compare them to old 350s. I have an 07 Yukon with over 180K. 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. Did Obama make them do this? 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. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? [] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. There is a good chance that some of the drivers side lifters decided to go. Hi Grant is that disabler still working for you ? 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. Does the disabler prevent the engine damage in the first place? This basically deactivates the cylinder deactivation system. My 2002 I had over 298K on it with no engine related issues. 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. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . 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. You will be placed in derate if the ECM does not see the correct resistance from the ATF intake. This valve is located on the oil pan rail and prevents excessive oil pressure from negatively impacting the AFM components. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. 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 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. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. 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! I would. Below youll see references to the L99 as a result. Install an AFM Delete Kit A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. I am having that done today on my 08 Suburban and its only costing me $225. Ditto , never buy a throw away vehicle again is my recommendation and my fix . If possible, will simply not using VVT provide a powerful,good running engine? I have successfully used a gadget that plugs into the ODBII. Im always sorry to hear when people run into issues like these. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? GM get a clue! What type of disabler did you go with? 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. Should I wait until the warranty runs out, or will that be too late to stop possible damage? If you left the original cam in, the AFM cylinders will be down about 25 lbs. I have 217,000+ on it and it never fails meever! Seems my oil pressure sensor is bad, are showing the same oil pressure at all times, even when it dosnt run.Dont know it that fault was there before i replaced the lifters. Changing the sensor didnt help. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. Can you tell me what needs to be done with the VVT? Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? If you just crack it without it starting it moves all the time . I would just have the AFM disabled (tuned out) then. I had to replace them all and the camshaft as well. the body is in great shape. They shift cam lobes by sliding the cam, never actually shutting down the value but riding a different lube! According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. is it still working good since you have done that with the trans fluid? He used seafoam and changed to synthetic oil. 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 []. Very expensive repair too! I have a 12 with 4.8 Silverado 75000 miles .or something similar . In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Better airflow reduces drag on the pistons and the associated pumping losses. I speak from some experience. I am trying to find out of this is true. 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. Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). .IMHO . The computers had not evolved enough to control the sytem. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. 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. 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. It has has 9000 miles and no lifter or other issues or codes so far. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. Double digit MPGs in my 98 K1500 would be a dream lmao. Only running on drivers side cylinders. No problems with any to this point. There may be an ignition related issue on that cylinder. I guess I might have to call a dealership or GM to get a definite answer on this one. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. Dummy Me thought gm learned its lesson in 1981 but they never did and I Too am stuck with a Buick thats just waiting to self destruct. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Didnt change exhaust nor tune so likely no change in power/torque. Cylinder Deactivation to the Rescue. Have an intake and Borla exhaust. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. 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. Just shut AFM off. Replacing engine due to issues caused by AFM. But the problem at that time was the computer technology. He claims that GM used the same engine whether it was or was not equipped with AFM in this year and model? I had one fail and it chattered the cam to the point that I had to Install a new cam. I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! 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 . I am hoping this does the trick. Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. 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? Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. Regarding the cylinder deactivation impact on fuel consumption . 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. thank You so much! Put an S&B cold air intake on last week with huge oiled filter and it made a big improvement in throttle response and it appears possibly a slight improvement in mileage. I had a 2007 Yukon XL 5.3 with the AFM. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). I was getting ~ 30 mpg, so I love that. Its not GMs choice to use AFM. 50,000 miles. The motor I pulled was a 2007 LY5 with about 77k on it. so the trans fluid worked for you then? Ive only put a straight pipe exhaust, intake, and a boost controller on it. But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. 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. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. do you fill to capacity anyways???? The oil is baked on to every component. The collapsed lifters will not engage the pushrods and both valves remain closed. Im praying that my RangeTech buys me a few years. Have misfire code and engine has what I would call a surge while driving. You will get codes thrown if the afm is physically removed without telling the ECM you did so. Thanks for the advice Brian! Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. I wont bother with blocking the relief valve. I have already dropped a lot of money on this truck (08 suburban). Id wait until the warranty expires then disable. any help? It only has about 9k miles on it. I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. Im confused from the write up about the plug in. 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. Can I (should I) also change to a standard volume oil pump? [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. Glad I did. When cylinders are deactivated, the number of crankshaft rotation increases between firing pulses. 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 recently bought a low mileage 2013 Silverado and the lifters collapsed. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. thx Brian, Knock on wood I drive a 2011 silverado 44 Ltd with the 5.3 AFM/DOD not tuned out or delete being used and have experienced no problems or any sign of problems for that matter juat rolled over 210,000 all original factory parts would you suggest I tune it out or juat let it ride I change my oil religiously and also use lucas products for all aspects of my motor. My question is: do I install the electronic disabler on the new engine to avoid future issues? What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? 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. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. I am going to do the full repair of the engine now, but not an overhaul (too hard to get at the pan). Logic says that it should not as the ECM isnt programmed to use AFM, but will it see a lack of resistance from no solenoid pack plugged in? has 92,000 miles and was just told I have cam and lifter failure. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . The LZ1 was upgraded with AFM and []. 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. This is in response to pretty much everyone. The engine will operate on 8cylinders, or V8mode, during engine starting, engine idling, and medium to heavy throttle applications. Just recently, GM announced a temporary closure. They learned that the oil level sensor was necessary and that we were supposed to have been advised that we needed to reuse the original oil pan. One month to the day driving on the highway got the Service Stabiltrak message quickly followed by the misfire code. I have a 2011 GMC Sierra 1500 with the 5.3. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. Some drivers want V8 power under their foot at all times. I couldnt agree with you less, yet I respect your opinions. Cylinder Deactivation (Active Fuel Management) General Motors Active Fuel Management engine control system has the ability, under certain light load driving conditions, to provide maximum fuel economy by deactivating 4 of the engines 8 cylinders. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? There are 5.3 cylinder deactivation problems that can occur. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. No other truck my ass .lol my 99 silverado 1500 with the junk LR4 4.8l and 320k miles 9n itgets 21mpg all day long with 93 octane gas in it. We need availability of a replacement engine without the AFM. Cylinder misfires (most common sign) Rough idling, poor acceleration, loss of power Check engine light with engine misfire codes Air-to-fuel ratios are either running rich or lean The easiest way to tell that you have an injector problem is through the check engine light and engine codes for misfires. However, the fuel savings are not always as much as expected. Really could use some pointers. Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. Took it to the dealer and was told I had a collapsed lifter. I had purchased an extended warranty when I bought the truck new. Hello. There is no light on my dash or anything that indicates the system is active or exists, so its very confusing, Im still not sure if my vehicle has it or not. The lifter seems to recharge whenever the truck sits for some time. How stupid do you have to be to whine like a welfare check cashing idiot when there are literally 3 or 4 different ways to totally disable AFM. I ran 0W-20 no more the 5000 miles between changes. I would appreciate any feedback. I am leaning heavily on installing the AFM disabler. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. 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. 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. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. With 40000 GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. Any problems to watch out for?Did you replace the VLOM? All Gen IV engine blocks haveAFMtowers and oil passages cast in. (Bought car 1 day before lifter died!) How is that an improvement. Basically rebuilt most of the engine while in the vehicle. I sold them when they were new. This new lawsuit is essentially identical to the previous. Thanks. Im crossing my fingers it does the trick! After reading these forums Im a little concerned about my decision to stay with GM. It seems this tough engine has everything incorporated into it. GM should recall every vehicle with this terrible design flaw! [], [] as the LS engine familys hybrid engine in trucks and SUVs. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? Every one of these engine will have a lifter fail, this is a travesty! My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. You may want to update your post. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. I read something the other day which I found to be funny. The biggest problem is nobody changes their oil on time. Or not because it is the cast iron block and not he aluminum block? My Wifes 17 Buick with afm was my attempt to get back to gm. Had nothing but trouble out of it. We recently purchased an 08 Suburban and noticed some shuddering around crusing speeds, usually 45-55mph and highway speeds around 75mph. in your opinion will this work, i really dont see any reason it wouldnt. This should be added to your earlier model if you experience oil consumption. Replaced all lifters on passenger side as well as pushrods for even wear. Would doing the disabler option once I get it back be the right one? Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. When they are locked into position, they wont wear further and cause issues down the road. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . Open to suggestions about best course of action. Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. Pulled right valve cover an rockers on syl 6 dont move. 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. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. It depends on the failure mode of the lifter however, certainly worth a try. How about if they just let us have a manual transmission agains for fuel mileage? 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. Runs better than new now and no more oil consumpsion!! They replaced all the lifters, said no other damage, problem lifters were on cylinders 6 and 7. The wife however found this deal on an Envoy Denali . I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. When an engine is contstantly running on oil that is broken down, it not only wheres out components because of no protection. Don't even get me started on the shortened life of the cooling, starting and charging systems. The engine will switch to operating on fewer cylinders when cruising at a constant speed. It has AMF. 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. When you don't need the full power of the engine, it provides better fuel economy." Driver reported this occurred suddenly while driving down the highway. Its a CA EMMISIONS TRUCK. Is there any potential down-side to doing this in other words, might this do more harm than good? TheAFMsystem can be identified by its components. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. 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. The most common are fuel pump failure, transfer case sensor failure, fuel injector failure, and carbon build-up. If under the truck while parked and it is doing it it sounds like it is towards the back of motor. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. . Accept i only have 60K on my truck and it hasnt recovered. I have an 07 Yukon with 230k on the engine. Any advice that you could offer would be great. Who knew? These trucks cost too much to have a terrible product. I have the towing package on my 13 Tahoe LTZ. also in the pan is another AFM oil filter near the external engine oil filter. Thanks for your help. We were getting a code that the cam position sensor was not functioning properly. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. It prevents the computer from switching over to four-cylinder mode. 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. 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. Chevrolet 5.3 Engine Issues and Recommendations I am considering the same. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. Number 7 cylinder lifters stops moving when truck starts. Fortunately, the old engine hadnt been shipped back to the remanufacturer. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. Next day, fired it up to take the the junk yard and it ran great. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. Lost number four GM uses 3 different styles all are engine specific. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). It could be the filter screen under the oil sending unit. All New lifters were from AC delco. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Disable the afm. Then changed the oil. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. Cant believe they havent fixed this in a decade. Dont want to make a move on a new truck or jump to a 2500 yet. Engine oil pressure is fine. Learn how your comment data is processed. I have a 2013 1500 with the LC9. In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. I have a noise in the engine but it seems to go away when revved up. Fouls those plugs. AFM - active fuel management strategy which deactivates the lifters on specific . the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. 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? If thats the case, Summit Racing has dedicated truck cams that will increase power through the rangebottom to topbut the meat of it is in the mid-range where your engine spends the most time. 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. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Now I know why there wa such a push to get older ,less efficient vehicles off the roads. Looking forward to input from the forum, Thank you. If the 4th cylinder lifter has failed, would driving it damage the engine? Brian, I have been reading your article about the AFM. [], [] 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 would say maybe 5% of my customers keep up on their oil changes. whith a disabler. Engines with AFM use a high-volume oil pump. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. Its Chrysler and Ford. Thats not all bad because it saves the cost of an AFM delete kit. Then had to drive the truck back to Tampa from Cheifland Fl. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. Any thoughts or suggestions would be appreciated. Get this, rebuild is only rings and maybe lifters. Just one. No it runs fine on sylinder one but not on 6 or 7!!! I only had 81k on the motor. Traded it with 180K miles and did not experience any problems. Help appreciated. I dont know where to being to look for the problem. NOT GOOD!! The only solution is to replace the entire cylinder head. The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. I cant really tell from driving. This replacement engine has the same camshaft sensor plug plug, 5 wire like the AFM would use, instead of the 3 wire. Delete the AFM, buy a tuner/chip, take it to a performance place and get an actual tune done that fixes it, replace the AFM lifters with non AFM type, change other engine components with thisetc..etc..etc??? I asume low oil pressure cant make some of the DOD lifters to malfunction? I will keep reading and take notes. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. I have had some say that it is the valves and others say that it is the cats plugged. IMHO . Yeh truck has 5237 miles on it 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. A 17 with 5.3. Anyway that horrible experiment was in the late 70s early 80s along with those converted Diesel engines..those like the 8-6-4 nonsense were just terrible failures. Todays computers are faster so it does work. It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). CHANGE YOUR OIL!!!!! Pod. Replace the cam or do the delete kit? Fuel pump failure is the most common problem and can occur due to a number of reasons, such as a clogged filter or a faulty pump. In other words, the crankshaft and bearings were not visible. The 2016+ Tacomas are junk. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. I have a 12 wit 4.8 Silverado 75000 miles The most common issue GM vehicle owners with AFM report is increased fuel consumption. If I put my truck in manual 5, it doesnt try to go into V4 mode. Your email address will not be published. Pulled the inntake and replaced valleypan With all the solenoids. He unstuck it and I took it for a drive and same thing happened. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? Easier said than done. Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! 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. You could also have tried that if the trans oil didnt work. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. Thank you. I ave noticed the point about excess oil spray. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. Teflon coatings does not last. AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. . This lowers the cost of building it [], [] aluminum block engine. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. Replaced all 16 lifters due to collapsed lifter on CYl #4. I have no other engine problems and Id like to fix the issue.