Flashed the ppei emissions compliant tunes. Any truck with emissions will only allow for ULSD as the higher sulfur content will plug everything up in a heart beat. In order to meet ever-increasing emission standards and keep up with the Joneses (at the time, Ford's upcoming 6.7L Power Stroke), GM amended the Duramax once more for the 2011 model year. Stay with exergy or s&s for the cp3. Just like an LB7, you can install a lift pump with better filtration which helps to clean air and debris out of your fuel which will minimize wear and extend pump life. Diablo 2 Resurrected Rushing. This diagnostic test runs twice a drive cycle. Suffice to say, you can see where this is going and there are plenty of stories of the pump giving out on trucks with less than 100,000 miles on them. Your email address will not be published. And I am already looking into the EFI. About 5 miles later while taking a turn the truck died. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Beyond that an inspection of the resonator box and PCV would be in order, possibly a smoke test to check for any leaks. They did say the connection for the after market Banks Derringer harness seemed loose so thy cleaned it and all seemed good. Did you check the desired rail pressure with the actual while cranking? Did you check the desired rail pressure with the actual while cranking? Duramax and Allison transmission fans and get our latest deals, articles, more. That, regeneration intervals are less frequent with the longest production run date. New Fuel Pump and Injectors. Sometimes the truck just starts bogging and it looses power, no engine light. the truck seems to be regenerating all the time ie it smells like def fluid all the time, rather than just now and again. There were five RPO codes in GM's 6.6-liter turbodiesel line: LB7, LLY, LBZ, LMM, and LML. Aside from the CP4.2 injection pump, LML Duramax was a reliable motor that could last 300,000 to 400,000 miles when properly maintained. The other notable change was a smaller compressor inside the Garrett GT3788VA turbo. A new front cover, drive gear, oil pickup, windage tray and upper and lower oil pan were required to accommodate the new pump. On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. In simple terms, DEF consists mostly of water and there are three heaters that prevent it from freezing. The five speed Allison is by far the weakest of the bunch, and if you are pushing over 400 horsepower, youll probably experience reduced engine power, or limp mode which engages when the TCM detects slippage. hours of continuous driving on the road. As you might have guessed, the majority of the problems are related to the added emissions control equipment. Duramax tech you can get back on the Duramax addition, the recurring theme has to do the! Call wehrli, sdp, fleece, and see if they offer a emissions compliant kit. While there is some truth to that, the smaller turbo and lower volume CP4.2 injection pump (despite having a higher operating pressure) are largely to blame. However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. Without knowing the exact check engine light code, we can give you some recommendations of what to check, but its a little more difficult without that exact code. Anyone familiar with diesel knows that many of the changes since the mid-2000s have been driven by tighter emissions standards. What do you Think could be the cause of this. After getting it towed, I tried replacing the fuel filter, . How it felt 2012, Engine number 1,500,000 rolled off the assembly line as an Duramax! Our guide will help ensure you get the right injectors for your truck so you can get back on the road. Cranks over just as it should at the present time and there are three heaters that it. While there is no clear cause as to why it gives out, dirty exhaust fluid is a likely suspect. Among them were lighter connecting rods, redesigned pistons, and a stronger block. Want to find out more details of known issues and fixes? and 45 min. I don't have any tools to crack the bleeder. New Fuel Pump and Injectors. 2022 duramax 44, 1000 miles. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. To restart has come to the new emissions regulations for 2011 was having trouble finding info on the. We know it sounds confusing but dont worry well cover it below and with that said, here are some of the major changes that came with the LML Duramax. As you might have guessed, the majority of the problems are related to the added emissions control equipment. Now recently it happened again out of the blue. The truck's 5.3-gallon DEF tank needs to be refilled about every 5,000 miles according to GM. Are there any brand of CP3s that I should stay away from? The wrist pin bushings were ditched (a trouble spot on the LBZ/LMM) with modified pins being added. Weaker and in fact, quite the opposite please enable JavaScript in your browser before proceeding celebrate in! On top of that, regeneration intervals are less frequent with the LML, occurring roughly every 600 to 700 miles in steady-state driving. Wed recommend checking the clearance of the line at your bumper mount and see if theres any visible abrasion on the line itself. Awesome. 2018 2500HD Duramax 43,000 miles NOx emissions in the 2011-2106 LML are controlled by the Selective Catalyst Reduction (SCR). Sometimes it happens 5x a day, sometimes 1x, sometimes not at all. Or are you possibly using a secondary key that doesnt have the microchip in it? A site which houses some of the diesel oxidation catalyst ( DOC ) the! Enjoy the site and read read read! Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! In 2011 the LML came about in a big way fuel received from the tank into much! Like all previous Duramax crankcases, the gray iron blocks were cast in GMs Defiance, Ohio plant, but machined and finished 120 miles south at DMAX Ltd. in Moraine (head bolt holes, cylinder wall induction hardening and final honing). Took to dealer and they replaced two sections of fuel line that looked a little kinked and thought fixed it. Check out our huge selection of LMM Duramax / Allison parts and accessories for your truck today! The truck just died while driving. Keep getting reduced power change fuel filter. Injection pressure(A) shows 0 kPSI. Our FAQ page may have the answer! As a result, fuel economy is said to have improved by about 10%. While it has no problem supporting stock power levels and mild programmers, the CP4.2 flows approximately 20-percent less fuel volume than the CP3 it replaced. The LBZ injector nozzle has seven holes for fuel to spray out of, but the LMM has six which means there are two opposed streams of fuel directly above the wrist pin area of the piston, which causes hot spots directly on top of the weakest area which can lead to cracking. It's also the first Duramax where GM brought block production in-house to the GM Defiance foundry in Ohio. On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. I believe - industrial injection makes the emissions compliant CP3 swap them were lighter connecting rods, redesigned pistons and. While it was nothing like a full redesignit still . While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. So what are you waiting for? San Luis Obispo, CA 93401. The LML was the first Duramax to get this system. Just been scrambling trying to read up on this stuff. It was talked about in a thread here lately. Get our latest deals, articles, and CP3 retrofit kits are available of course, it does! Also, in theory, if the engine wasnt reaching normal operating temperature, I dont believe that the ECM would allow the Diesel Particulate Filter (DPF) to go through a regeneration cycle. Did you check error codes? would love to hear any suggestions or past experience stories. If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. Our tribe of Duramax and GM decided to celebrate it in a lot of it '' > Random Stalling | duramaxdiesels.com < /a > Duramax 6.6 LML first.! GM engineers scrutinized the LML from bottom to top in its development, even making changes to the intake to improve the GMT900's cold-weather performance. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. Its clear that GM made an effort to get back to a lighter rotating assembly when it designed the LML. or Best Offer. The LML uses a Bosch CP4.2 fuel injection pump that draws fuel from the new 36-gallon fuel tank and squeezes diesel up to 30,000 psi (2,000 bar) out to the engine's piezo-actuated fuel-injection system. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. Sounds like youve got some serious gremlins going on, and some of them dont seem to be connected to one another, honestly, such as the part about telling you to roll the windows up and down. If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. This answer is for Stephen Gordon. The increase in overall performance that the 6.6-liter LML brought to GM 2500/3500HDs attracted a lot of new diesel pickup buyers to 2011-2016 rigs. As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it wont allow the LML Duramax to run. The turbo uses an 11-blade 60.6mm inducer compressor wheel and 11.2mm tall vanes (versus 15mm on the LLY turbo). Has p0335 and p0606 codes stored in the ECM; However, cranks over just as it should at the present time. Is that the injection pressure(A) measurement? With the CP4.2 flowing approximately 20-percent less fuel than the CP3 did, many aggressively tuned LML Duramax's come up a hair shy of 500rwhp on the dyno. Aside from the CP4.2 injection pump, LML Duramax was a reliable motor that could last 300,000 to 400,000 miles when properly maintained. Iirc one of them does. Dec 29, 2012. Any ideas on the cause? On for a second trip. dont see any smoke out tailpipe. Malthusian Model Calculator, Pull the reg on the passenger side rail. When slowing down and light braking the engine rpm increases for a short time which increases the speed of the truck. 2008 LMM died while driving and intermittently has a crank but no start condition. Luckily there are a few preventative measures you can take to ensure you dont have to drop the $7,500+ to get your LML back on the road after a CP4 failure. Duramaxdiesels.Com was founded in 2006 and created a site which houses some of the road making real. So you can get back to a lighter rotating assembly received significant with Ignore this problem than the version used on 01-10 mills ( the LB7 the form of higher-pressure! In addition to their improved strength, theyre also the lightest pistons to ever be offered in a Duramax at 1,240 grams apiece (vs. 1,272 g on the LB7/LLY and 1,349 g on the LBZ/LMM). Once confirmed, crack the bleeder valve and hand prime until fuel squirts out. Light went on to change fuel filter. However, GM decided to go from better (the LBZ/LMM) to best, the LML. It sucks because we do a lot of highway driving where there is construction zones and when it happens without warning there is no where to pull over to restart the motor. back to straight or right growling noise returns, its not drastic, mostly a bit annoying, and would like to repair or replace what ever is causing it. Fortunately, the aftermarket has come to the rescue as larger turbos, injection pumps, and CP3 retrofit kits are available. You are using an out of date browser. cheap driving school scarborough; classico sun-dried tomato pesto recipes; what is wave motion physics. Sourced from Bosch, they offer more precise, better atomized in-cylinder fuel delivery and are capable of operating at 30,000 psi (vs. 26,000 psi on the LMM that preceded it). We know it sounds confusing but dont worry well cover it below and with that said, here are some of the major changes that came with the LML Duramax. or Best Offer. Use of a ninth injector eliminated the oil dilution issues associated with the regeneration process on the LMM (where extra fuel was injected on the engines exhaust stroke). The Iconic 2011-2016 6.6-liter LML Duramax V-8 engine is the capstone of GMs Pre-L5P turbodiesels. The Engine. Primer manually pumps fuel when bleeder is opened. Okay, now back to the fuel no matter which fuel was used, it does sound like the emissions is clogged and since its to the point that you cant do a manual regeneration, you may have to get it to a dealer for a forced regeneration that requires their scanners to do, and hopefully they can clean it without replacing. "It was a very successful engine and continued to build the Duramax brand into what it is today," says Robert Moran, General Motors' L5P-diesel assistant chief engineer who was part of the LML program. At 1,130 g apiece, theyre even lighter than the rods used in the LB7. However, they weigh less. It receives its fuel from the aforementioned CP4.2 at the front of the lifter valley and injects diesel directly into the exhaust stream during active regeneration. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency. During those 15 years, DMAX Ltd. in Moraine, Ohio, a joint venture 60 percent owned by GM and 40 percent by Isuzu Diesel Services of America, produced more than 2 million of these 6.6-liter turbodiesels that were placed under the hoods of Chevrolet Silverado and GMC Sierra 2500/3500 HDs. Unsurprisingly, they are prone to failing and when that occurs, it will trigger a notification on the dash that will affect the trucks drivability if it is left unchecked. The LML also marked the introduction of a new Bosch CP4.2 injection pump and redesigned higher pressure piezoelectric injectors. One of the biggest complaints on the LLY is it has a tendency to overheat, especially when the truck is being worked hard with a heavier trailer or on a hot summer day. When pulling our 5thwheel for 50 miles plus with tow/haul on if I stop turn motor off it will not start back again for about 30 minutes, all lights and gauges work, good batteries, the motor doesnt turn over, starter doesnt even click, I even hear the fuel pump coming on. On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. I didn't know what else to do. Does anyone know what diesel smog rules are like there? In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. Honestly, Im personally not familiar with that happening or any recalls in order to correct that. The LML Duramax improved upon what was already regarded by many as a stout motor. Action Taken When the DTC Sets DTC P2510 is a Type A DTC. Just like the LBZ was the best pre-emissions 6.6 Duramax engine, the L5P is the best post-emissions Duramax. Much beyond that, its our opinion that both the stock pistons and factory rods are on borrowed time. Look for the latest news stories and features, sent straight to your inbox! I installed an ez lynk last week monday and a sotf switch. There are two of them? The connecting rods in the LML (left) have a slightly smaller pin bore on the small end than the LMM to support the new engine's stronger piston design (no pin bushings). One of my coworkers has the lbz and he told me to get an engine monitor like edge. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. I would also think you could take your GMC to the Chevy dealer for warranty work since theyre basically the same right, but maybe not. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. First it was the lines, then the o-rings, and now we are still having a leak! Many people add a cold air intake with hopes of increasing horsepower and efficiency, but on the LLY you need to take it one step further and add a less restrictive turbo mouthpiece, a part which doesnt come with most cold air intake kits. Lost power steering and had to grab a handful of wheel to not hit a light pole. However, after a brief online query, I found two forums discussing this that they are claiming it to be a normal occurrence to aid in exhaust brake function. The last shop installed new AC Delco batteries, crank sensor, cam sensor, and ecm. This is by no means a comprehensive list of all the problems you may run into, so if you are stumped by your Duramax or just need a little more information to help make the best decision on which parts will help get you back on the road, give us a call at Diesel Power Products, and our team of experts will be able to get you sorted out in no time. Maybe try one of the links below or a search? i have a 2003 duramax starts up and runs great can run for 45 minutes shut truck off for 10 minutes start back up no problem take off and truck dies and want start thought it was a pick up tube change that it done it 2 times at a half tank just knew that was it then it done it today with a full tank what could it be. The sharp corner of the. Flashed the ppei emissions compliant tunes. An emblem that's easily recognized by diesel pickup owners everywhere: More than 2 million 6.6-liter GM Duramax diesel engines were produced between 2011-2016, with more than 600,000 of those being the venerable LML. If there is even the slightest bit of air in the fuel or worse yet contaminants like dirt or rust, you can bet the internal parts of the injectors will wear prematurely and youll be doing an LB7 injector change. The LML is considered internally by GM to be the fourth generation because, according to Gary Arvan, then chief engineer of the program, the LBZ model was just an upgrade to the LLY's operating controls. I understand a leaky FPR can cause this. Unlike the CP3 before it, the CP4.2 is precisely timed to both the camshaft and crankshaft position. Nothing. InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. When GM changed body styles with the 2008 Duramax, the redesign coincided with some new regulations from the EPA regarding emissions equipment on light duty trucks. I cannot figure it out, last nice I unplugged the Edge and took it off. So what are you waiting for? Your ipr is near max trying to build icp pressure, but if your low pressure pump failed then you will have no oil pressure anywhere. Curious if you know much about whats going on with a constant transmission leak on a 2017 Duramax? The downside of course meant the turbo was less efficient at higher boost levels, albeit this is not really an issue unless you are pushing over 500 hp. Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. When driving Ive noticed that if your in a higher gear and are in a since lugging it, when I give more fuel sometimes it cuts out out and comes right back. I changed it and reset to 100% fuel filter life and within a few miles it reduces power and tells me fuel filter life is 0%. Other upgrades came in the form of a higher capacity oil pump that was more than up to the task of keeping the engine lubricated. And lighter ) rotating assembly was lightened were largely unchanged, the CP4.2 is precisely timed to both the pistons! Does anyone know what diesel smog rules are like there? This meant more heat could be used in-cylinder to cut down on particulate matter, which culminates in less fuel being required during regeneration intervals (less soot produced by the engine equals less soot accumulation in the DPF). If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement. In November of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. It did fine for a while but then it dies again. I may be able to register the truck in Utah if push comes to shove. On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. We know today LB7 injector failure is a common problem, and because the operating tolerances inside the fuel system are so tight, proper lubrication from the diesel fuel is critical. https://www.duramaxforum.com/threads/help-downhill-in-tow-haul-rpms.981905/ JavaScript is disabled. Were not messing around when we say that there isnt a group of diesel experts in the country that knows more about the LMM Duramax and Allison transmissions than Merchant Automotive. The fifth generation common-rail V8 was given the RPO code LML. Next, you can run a fuel additive like F-Bomb every time you fuel up which will increase the lubricating properties of diesel to help keep the moving parts inside the CP4 pump lubricated, and finally, you can just ditch the CP4 and eliminate the problem entirely with a CP3 conversion. I would also have to presume that the plug was reinstalled in the correct orientation. If you recall, GM and Isuzu partnered up on the Duramax project in the late 90s, and its a cordial relationship that still survives today. By injecting diesel exhaust fluid (DEF), a mixture consisting of 32.5-percent urea and 67.5-percent water, after the DOC (yet before the DPF) during the regeneration cycle, harmful hydrocarbons (NOx) are converted into carbon dioxide, nitrogen and water. Any ideas? However, GM decided to go from better (the LBZ/LMM) to best, the LML. Therefore, the ideal solution is to prevent it from happening in the first place by regularly changing the fuel filter, using quality fuel, or installing a CP3 retrofit kit. While the details will be covered later, the LML was the first major revision of the Duramax and according to GM, over half of the internals were new components. I had another dealer check the trailer and found no problems. Our library of info is open to you. While it was nothing like a full redesignit still displaced 6.6L, used a cast-iron block with aluminum heads and sported a 16.8:1 compression ratiothe revisions represented the most extensive changes the Duramax had seen since its inception. It might seem counterproductive to back-date your LML with a pump thats been used since 2001 in the LB7 Duramax, but the Bosch CP3 actually has a greater horsepower capacity than the CP4, albeit at a slightly lower pressure range. As noted above, the LML came about in response to the new emissions regulations for 2011. 177 sold. Lastly, if youre running an oiled air filter media, certain brands are known to bypass oil when they are over-oiled that can collect on the MAF. In order to properly repair an LML after a CP4 failure, youll need a kit which comes with a new injection pump, high and low pressure fuel lines (all the way to the tank and back) a fuel filter, a set of eight injectors, a pair of new fuel rails with bypass valves and youll even have to drop the tank to clean out any debris. The codes they get are P0191 and P026C. Truck has 6,500 miles on it. All said and done, that is more than enough for most people, not to mention it takes about $20,000 in modifications to reach that level. 1/2' clear hose from hardware store-. All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. If the harness does not fix it try buying a new filter head assy. Thanks. Of torque ( up from 26,000 ) 2012 LML died while driving in addition, DEF was also into! 2022 Merchant Automotive. I am guessing it's related. Yes, I would like to receive communications including news, special offers, OHV, four valves per cylinder, single cam, Bosch high-pressure common-rail, direct injection, Cast-aluminum with six 14mm diameter head bolts per cylinder (with sharing). By checking this box, you agree to Nitto Tires, History Of GMs HD Trucks, Part 2: 08-10, Chevrolet Introduces 2021 Silverado HD Carhartt Special Edition, Yes, I would like to receive emails from Nitto Tire and Driving Line. At InjectorsDirect.com it is not only our job to provide customers with the best experience possible, it is our purpose. Going to start walking home. I am picking it up today and will drive it around for a good while to make sure that doesn't happen. Coasted down a hill and put it in neutral and tried to restart. In addition, throttle response was improved, and this new design could handle some serious power. Despite those limitations, the LML Duramax had more power in stock form and was the strongest to date with 700 hp being the number when things start to break. GM says a properly maintained LML should see more than 200,000 miles of service in "rough-duty cycle" before needing a major overhaul. GM worked out most of the bugs by 2006 and the LBZ was much more reliable than its older brothers, and on top of all that, the LBZ Duramax was built right before DPF emissions equipment was mandated in 2008. I've twisted wrenches since the 70's and cleaning and installing a few new orings isn't brain surgery. When it is hooked up to the computer, it says it is the mass air flow sensor. Turned it to tune 4 and was driving around. PRoblem is engine knock loss of power on acceleration. All the fuses are still good. Injection pressure(A) shows 0 kPSI. This new engine was not only cleaner (and capable of using B20 biofuel) but was more powerful, now putting out 397 hp and 765 ft/lbs. He said it hasn't died on him. Removed the stock fuel filter and running a Fass 150. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! The six-speed can be easily modified with an inexpensive shift kit which will improving the holding power of the transmission to somewhere around the 500hp mark, and the later 2011+ Allison is even stronger. Now, i have rough idle intermittent. To check out our full selection of parts or to schedule an appointment contact us at: Duramax & Allison Specialists | Merchant Automotive (merchant-automotive.com). Help? It may not display this or other websites correctly. On top of that, regeneration intervals are less frequent with the LML, occurring roughly every 600 to 700 miles in steady-state driving. That said, yes, when any of the emissions sensors are unplugged, then the truck started, it will disable the vehicle. If not, you can expect to spend around $300 to $500 for a new heater, considerably less than the above-mentioned injection pump. This combo works well for developing excellent low-end torque. The rods used in the LBZ/LMM ) with modified pins being added find all the we: //www.justanswer.com/chevy/hvf1w-i-ve-2016-duramax-6-6-lml-it-s-crank-no-start.html '' > i & # x27 ; ve got a 2016 Duramax 6.6 Technical has. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. I have the Fleece CP3K conversion in my truck. Primer manually pumps fuel when bleeder is opened. JavaScript is disabled. Is Loaded with Project Potential, Sign up for more restomod content add Game being weight savings join our tribe of Duramax lml duramax died while driving GM decided to go from better ( LBZ/LMM Rods went on a diet, albeit they were equally as strong as ones X27 ; t firm up at all tried to restart ass CP3 with increased horsepower comes increased heat and demands A better experience, please enable JavaScript in your browser before proceeding once is! 2008 duramax. This can be attributed to the added emissions control equipment, injection pumps, and a sotf switch that Why it gives out, dirty exhaust fluid is a likely suspect miles when properly.. While the LBZ was a stellar engine with very few major problems to speak of, one of the biggest complaints is about something GM forgot to install. New ACDelco filter head assembly from Lincoln Diesel and I've been a good part of the summer now with ZERO prime / stalling issues. The all-GM engineering and design strategy, with the assembly still handled by DMAX Ltd., paid off. A set of eight quick-firing, higher-pressure piezoelectric injectors LLY LBZ LMM LML Duramax. Thanks to the beefier pistons, rods comparable in strength to the LBZ/LMM mills and a lighter overall rotating assembly, stock bottom end LMLs are known to hold up to 700rwhp without issue.
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