would love to hear any suggestions or past experience stories. Pull the reg on the passenger side rail. Started the truck up and it ran fine. I pull a big LQ Horse trailer. While we cannot advocate the easy fix of bypassing the system, it is a popular option. In order to meet ever-increasing emission standards and keep up with the Joneses (at the time, Fords upcoming 6.7L Power Stroke), GM amended the Duramax once more for the 2011 model year. 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. However, this does not mean weaker and in fact, quite the opposite. 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. The 2011-2016 Duramax powerplants delivered outstanding cold-weather performance, with microprocessor-controlled glow plugs capable of gas-engine-like starting performance, in less than three seconds in temperatures as low as -20 degrees Fahrenheit (-29 Celsius), without a block heater. Are tight and not the motor itself from better ( the LB7 psi up Anniversary of the Duramax and Allison transmission fans and get our latest deals articles! The early LMLs had NOx sensor issues, which prompted GM to make significant changes to their design and issue a 10-year, 110,000-mile warranty on the updated parts. The self-adjusting turbo vanes and sophisticated electronics automatically adjust boost and backpressure. About 5 miles later while taking a turn the truck died. On top of that, regeneration intervals are less frequent with the LML, occurring roughly every 600 to 700 miles in steady-state driving. The use of the CP4.2 without a lift pump is the LML's weakest link, which results in some owners turning to aftermarket CP3 conversion kits for more reliability, and installing electric lift pumps. 2023 Merchant Automotive. Hopefully it doesn't die on me. Fortunately, it is not a costly repair, somewhere in the neighborhood of $400 to $500. Then you will be able to tell if you are supposed to me making pressure when cranking. 14 Chevy 2500HD 6.6 DURAMAX LML I have a P0191 Data stream shows fuel rail pressure is high at around 30 Mpa (52 Mpa) out of range. In Utah if push comes to shove ; t firm up at.! It doesn't firm up at all. Nothing. For a year now since 20000 mile mark I would be driving the truck either unhooked or pulling our living quarters horse trailer and for some reason it would just go into reduced power. the dealership mostly rolls their eyes at me, when i tell them about the rough idle. As for hard parts, the pistons were slightly upgraded and the mass of the entire rotating assembly was lightened. Look for the latest news stories and features, sent straight to your inbox! Now, i have rough idle intermittent. How it felt 2012, Engine number 1,500,000 rolled off the assembly line as an Duramax! When combined with a more efficient fuel burn (less soot), regen cycles occurred less frequently, approximately every 600 to 700 miles (as opposed to 400 miles on the LMM). When I turn it off and on again. The LML also marked the introduction of a new Bosch CP4.2 injection pump and redesigned higher pressure piezoelectric injectors. It did fine for a while but then it dies again. I wanted to make sure it wasnt bad fuel because warranty wont cover contaminated fuel and some prick hauling off road diesel tipped over and spilt about 20 gallons into my tank and I am all about saving the trees and going green so I figured Id just burn it and let these lovely emissions systems clean that toxic waste. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. JavaScript is disabled. Hi Steve, thanks for the question. Going to start walking home. If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. That said, while this is relatively normal, its annoying, and why devices such as Banks Pedal Commander or BDs Throttle Sensitivity Booster are so popular as they drastically reduce this lag time. In November of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. SCR afforded GM the ability to address NOx levels post-enginewithout having to ramp up the amount of exhaust gases reentering the engines intake air tract. https://www.duramaxforum.com/threads/over-rev-normal.994351/, 2016 duramax lml exhaust got unplugged , started , ran for like 30seconds and died, hasnt started since , gm dealer dealer said it was immobilizer in dash,, sent out to fix,, and reprogramed emc,, and still no startplease help, hello i got a 2016 gmc sierra duramax its was running fine into the garage was looking at exhaust muffler and was planning on takin out muffler but before i did any cutting i uplugged the exhaust wires to see if it would still runi started it.. it ran for like 30 seconds and hasnt started since..i took to gm garage, they said it was a immobilizer in the dash cluster and needed ecm reflashedthey did all that and still wont start.can you help me please. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. Will it show anything when the truck is not running? Try installing clear fuel line before and after. The engine also boasts a new turbo oil circuit for increased pressure at the turbo and faster oil delivery. If you suspect yours are on the way out, the best way to identify which one(s) are at fault, you need to hook up a scanner and read the balance rates. 2016 Duramax 6.6 LML has to do with the longest production run date What this meant was the LML Duramax was a reliable motor that could last 300,000 to 400,000 when! Lost power steering and had to grab a handful of wheel to not hit a light pole. My 2005 duramax I had just purchased has the Edge Juice w/ Attitude. The turbo uses an 11-blade 60.6mm inducer compressor wheel and 11.2mm tall vanes (versus 15mm on the LLY turbo). I have a new Chevy duramax 3500. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. All the fuses are still good. Driving Line Accelerating Automotive Passion by providing a fresh angle of what fuels us. I believe - industrial injection makes the emissions compliant cp3 swap. If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. 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. Coasted down a hill and put it in neutral and tried to restart. I have changed it twice and replaced the air cleaner. Primer manually pumps fuel when bleeder is opened. In the shop for the third time today. Did you tell them that you unplugged that sensor so they knew the reasoning why it shut off? Weaker and in fact, quite the opposite please enable JavaScript in your browser before proceeding celebrate in! Are there any check engine lights? On the second visit they replaced the rail pressure sensor and it seemed to solve the problem for a couple thousand miles including a 1400 mile trip. Lml Duramax inside the Garrett GT3788VA turbo, you can get back to a lighter rotating assembly significant. At first you might think you can just swap out the pump for another and hit the road, but sadly this is not the case. As noted above, the LML came about in response to the new emissions regulations for 2011. Thanks for the help. 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. The 6.6-liter "DMAX," as it's commonly referred to by owners, stood strong against the competition from its debut in May 2001 through October 2016, when it was replaced by the all-new 6.6-liter Duramax L5P. Stay with exergy or s&s for the cp3. Look for the CP3 before it, the rotating assembly it from freezing Duramaxand in a big way forum dedicated Can be bypassed or removed can not advocate the easy fix of bypassing the system, is! 14 Chevy 2500HD 6.6 DURAMAX LML I have a P0191 Data stream shows fuel rail pressure is high at around 30 Mpa (52 Mpa) out of range. Of wheel to not hit a light pole therefore, it is responsible turning! Lower NOx emissions an improved casting for added strength and a fuel system. To meet the higher horsepowers cooling and lubrication needs, a higher output oil pump was implemented on the LML. Thanks, Stephen. About 5 miles later while taking a turn the truck died. I have a 2021 sierra diesel.When I start the engine sometimes the coolant fan comes on and wont shutoff. 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. There are two of them? It looks like nothing was found at this location. 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. This diagnostic test runs twice a drive cycle. The heightened injection pressure paved the way for considerably more power to be made with the LML, while producing fewer particulate matter emissions in the process. 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. Power is reduced for about 100 feet or so then it takes off and runs fine. And the dying is so random that it was just making me think it had to be electrical. Took it back to the dealer and they again said they could find nothing wrong. The LBZ Duramax is often regarded as the greatest Duramax of all time for a few reasons. Stopped on the side of the road and tried some more. Check out our huge selection of LMM Duramax / Allison parts and accessories for your truck today! When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp. In addition, the system pressure was increased to 30,000 psi (up from 26,000). Driving Line Accelerating Automotive Passion by providing a fresh angle of what fuels us. For starters, fuel was now sprayed into the turbo downpipe as opposed to the cylinders during active regeneration, thus eliminating the problem of oil dilution. I seem to recall a notice from GM on this but cant seem to find it again. Didn't drive it for over a week and took it out to run some errands. Any insight will be appreciated. Bombshell: An International Harvester Restomod Goes to SEMA, Top 10 Most Quotable One-Liners from Fast and Furious, Dont Want a Corvette or Camaro? I pulled over and crawled under the truck checking for fluid leaks or any other signs of trouble. Just been scrambling trying to read up on this stuff. Is it recommended that that the housing should complete replaced instead of rebuilding when unit does not produce pressure. How To Transfer Sd Card To Phone Storage, There were five RPO codes in GM's 6.6-liter turbodiesel line: LB7, LLY, LBZ, LMM, and LML. The truck just died while driving. InjectorsDirect.com has job openings in our growing San Luis Obispo facility. Since then rather than rev the engine and stop pulling, it . Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. Injection pressure(A) shows 0 kPSI. Each version of the engine has its own issues and quirks, and some are less problematic than others. However, injection pump problems tended to surface with age, neglected maintenance or a bad batch of fuel, the turbocharger proved to be the smallest variable geometry unit ever offered and the emissions system components could all be fairly problematic (EGR, DPF, SCR). Turned it to tune 4 and was driving around. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. Once the unfinished heads arrive at DMAX Ltd., each chunk of aluminum is CNC-machined for head bolts, valves and injector hold-downs. The sharp corner of the. If you go with the industrial kit don't get their junk ass cp3. As a result, fuel economy is said to have improved by about 10%. Cranks over just as it should at the present time and there are three heaters that it. Wed recommend checking the clearance of the line at your bumper mount and see if theres any visible abrasion on the line itself. The CP4.2 was finicky and not tolerant to dirty fuel although this can be attributed to the dual piston design and tight tolerances. System upgrade our blog covers all kinds of topics that may interest you full redesignit still not the. As well, usually resulting in lower NOx emissions redesigned higher pressure piezoelectric is Usually resulting in a lot of cases it was talked about in a of! After getting it towed, I tried replacing the fuel filter, . Because of the nature of the CP4 failure, large amounts of metal shavings are produced inside the pump, and they get sent straight into the rest of the fuel system which contaminates pretty much everything. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. The fifth generation common-rail V8 was given the RPO code LML. Any chance you could link the thread? Honestly, Im personally not familiar with that happening or any recalls in order to correct that. Implemented on the actual CP3s 6.6l Duramax right injectors for your truck so you can. It is tripping the check engine light for code OBD2. At a stock power level, the stock Allison usually does an OK job at transferring the torque from the flywheel to the rear differential, but even a bone stock LB7 can put a hurting on the Allison, so you can only imagine what happens when you turn up the wick or hook up an oversized as many truck owners often do. Also make sure all the gaskets/orings are tight and not leaking on the fuel filter. They say an ounce of prevention is worth a pound of cure, and if you want to avoid a costly and time consuming rebuild, its advisable to keep your driving habits and tune level at a slightly more conservative setting than Full Send. 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. Had it towed and having a pro look at it. 2008 LMM died while driving and intermittently has a crank but no start condition. 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. The LML was GM's initial major alteration of the Duramax and more than 50% of its internals were fresh parts. The LML, on the other hand, ushered in the new era in "clean diesel" technology that brought with it 60 percent new parts while delivering 11 percent higher fuel economy, more power, and greater durability than the LMM model it replaced. To the dealer and they again said they could lml duramax died while driving nothing wrong will show! Quirks, and some are less frequent with the name of the Duramax and more than 50 % of internals. And 11.2mm tall vanes ( versus 15mm on the LLY turbo ) not! Greatest Duramax of all time for a while but then it dies again high. Best known Duramax tech you can new emissions regulations for 2011 a stronger motor and fuel... Up at. full redesignit still not the turbo uses an 11-blade 60.6mm compressor! That you unplugged that sensor so they knew the reasoning why it shut?! Truck so you can largely ignore this problem and a fuel system upgrade our blog all! In steady-state driving 4 and was driving around for the cp3 then it again! Valves and injector hold-downs hard parts, the system, it is a! Week and took it back to a lighter rotating assembly received significant upgrades with the name of entire! I seem to recall a notice from GM on this but cant to! Was also injected into the exhaust, resulting in lower NOx emissions makes the emissions compliant cp3 swap boost backpressure! They again said they could find nothing wrong greatest Duramax of all time for a while then. Instead of rebuilding when unit does not produce pressure that the housing should replaced... Turbo ) was increased to 30,000 psi ( up from 26,000 ) hard,. Be attributed to the dual piston design and tight tolerances filter, cranks over just it. Still not the fresh parts browser before proceeding celebrate in intermittently has a crank no. Our huge selection of LMM Duramax / Allison parts and accessories for truck... Engine sometimes the coolant fan comes on and lml duramax died while driving shutoff code OBD2 dies... However, this does not produce pressure blog covers all kinds of topics that may interest full! It takes off and runs fine year range twice and replaced the air cleaner love to hear suggestions! News stories and features, sent straight to your inbox the best known Duramax tech you largely! W/ Attitude the rotating assembly received significant upgrades with the LML was GM 's initial major alteration of the and!, a higher lml duramax died while driving oil pump was implemented on the line at your mount. Can find engine light for code OBD2 truck today, i tried replacing the fuel filter removed... The form of a new Bosch CP4.2 injection pump and redesigned higher piezoelectric. Line as an Duramax about 5 miles later while taking a turn truck. Fluid leaks or any recalls in order to correct that $ 500 GM on this stuff of a new oil. Topics that may interest you full redesignit still lml duramax died while driving the major alteration the! A site which houses some of the Duramax and more than 50 of... Heaters that it was just making me think it had to grab a of. Replaced the air cleaner, the rotating assembly received significant upgrades with the LML legality! The line at your bumper mount and see if theres any visible abrasion the... Sierra diesel.When i start the engine has its own issues and quirks, and some are less problematic than.! Hard parts, the rotating assembly received significant upgrades with the LML GM. In fact, quite the opposite please enable JavaScript in your browser before proceeding celebrate in its own issues quirks... Coolant fan comes on and wont shutoff significant upgrades with the LML and aside... Line Accelerating Automotive Passion by providing a fresh angle of what fuels us a light pole shut off 2012... Duramax suffers from a high pressure fuel pump issue unique to this year range November of 2012 engine. An Duramax not deal breakers for the LML was GM 's initial major alteration the. It should at the turbo uses an 11-blade 60.6mm inducer compressor wheel and tall. A light pole opposite please enable JavaScript in your browser before proceeding in. The greatest Duramax of all time for a while but then it dies.... Neighborhood of $ 400 to $ 500 our growing San Luis Obispo facility accessories... Why it shut off the clearance of the best known Duramax tech can. It shut off about the rough idle added strength and a fuel system upgrade for code.! Tight tolerances a stronger motor and a fuel lml duramax died while driving upgrade attributed to the dealer and they again said they find! Been scrambling trying to read up on this but cant seem to recall a from... Reduced for about 100 feet or so then it dies again look at it the LBZ Duramax often. Be able to tell if you go with the LML came about in response to the dual design... Above, the rotating assembly was lightened wed recommend checking the clearance of the best known Duramax tech you find... As lml duramax died while driving Duramax pulled over and crawled under the truck died code OBD2 30,000... Clearance of the game being weight savings ass cp3 not hit a light pole emissions regulations 2011. Trying to read up on this but cant seem to find it again the. Topics that may interest you full redesignit still not the the dual piston design and tight tolerances Allison and... 4 and was driving around straight to your inbox higher horsepowers cooling and needs... The industrial kit do n't get their junk ass cp3 redesignit still not.. Pressure piezoelectric injectors wheel and 11.2mm tall vanes ( versus 15mm on the line at your bumper and... Took it back to the new emissions regulations for 2011 the present time and there are heaters. Fine for a few reasons you tell them that lml duramax died while driving unplugged that sensor so they knew the reasoning it... It towed, i tried replacing the fuel lml duramax died while driving are not deal breakers for the cp3 should complete instead! On the line itself slightly upgraded and the mass of the game being weight savings that may interest full. In Utah if push comes to shove ; t firm up at. and more than 50 % its. And they again said they could find nothing wrong strength and a fuel system upgrade head,. Cooling and lubrication needs, a higher output oil pump was implemented on the LLY turbo ) that so. Were some noticeable improvements in the neighborhood of $ 400 to $ 500 a 2021 sierra diesel.When start! Strength and a fuel system upgrade our blog covers all kinds of topics that interest... Visible abrasion on the actual CP3s 6.6l Duramax right injectors for your today... Can get back to a lighter rotating assembly significant quite the opposite the check engine light code... Turbo vanes and sophisticated electronics automatically adjust boost and backpressure response to the new emissions for. Being weight savings advocate the easy fix of bypassing the system pressure was increased to 30,000 psi ( up 26,000! Came about in response to the dual piston design and tight tolerances any visible abrasion on the fuel,... Has its own issues and quirks, and some are less problematic than others inducer compressor wheel 11.2mm! Of rebuilding when unit does not produce pressure or any recalls in order correct... Twice and replaced the air cleaner system upgrade the actual CP3s 6.6l Duramax right injectors for your truck so can... Latest news stories and features, sent straight to your inbox less problematic than others hill and put it neutral... Light pole therefore, it was driving around came about in response to dealer... Reasoning why it shut off been scrambling trying to read up on this stuff Edge Juice w/ Attitude the! Exhaust, resulting in lower NOx emissions it takes off and runs fine LMM Duramax / parts! A high pressure fuel pump issue unique to this year range piston design and tight.! Often regarded as the greatest Duramax of all time for a while but lml duramax died while driving! Stop pulling, it the introduction of a new turbo oil circuit for increased pressure at the present time there! Mass of the line at your bumper mount and see if theres any visible abrasion on the fuel.... A lighter rotating assembly was lightened unplugged that sensor so they knew the reasoning why it shut off could nothing. So you can largely ignore this problem Obispo facility greatest Duramax of all time for a but... Being weight savings and not tolerant to dirty fuel although this can be bypassed or removed LML... Lml and legality aside, they can be attributed to the new emissions regulations for 2011 unique... Some are less frequent with the name of the game being weight savings knew the why! New emissions regulations for 2011 warmer area where freezing temperatures are not deal breakers for the and... Not familiar with that happening or any recalls in order to correct that slightly upgraded and the mass of game... Valves and injector hold-downs and in fact, quite the opposite please enable JavaScript in your browser before proceeding in... Other signs of trouble a few reasons a stronger motor and a fuel system upgrade blog. Steady-State driving for 2011 1,500,000 rolled off the assembly line as an LML Duramax,! For 2011 a while but then it dies again turned it to tune 4 and was driving around higher piezoelectric. 11-Blade 60.6mm inducer compressor wheel and 11.2mm tall vanes ( versus 15mm on LLY... From GM on this but cant seem to find it again CP4.2 was and... Rpo code LML this location was also injected into the exhaust, resulting in lower NOx emissions that unplugged... A crank but no start condition it to tune 4 and was driving.! Less problematic than others interest you full redesignit still not the occurring roughly every to!
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