For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. I've twisted wrenches since the 70's and cleaning and installing a few new orings isn't brain surgery. For those in the aftermarket, this means the LML is much less prone to cracking pistons at higher horsepower levels than the LBZ and LMM. And redesigned higher pressure piezoelectric injectors is the primary reason why fuel economy is said to have improved by 10! The regeneration (DPF cleaning) process is a bit different from what was used on the LMM. Is that different than just block off plates? No significant changes were made to the cylinder heads for the LML, but the gravity cast operation to make them continued to be conducted by Isuzu over in Japan. I had another dealer check the trailer and found no problems. The sharp corner of the. Any truck with emissions will only allow for ULSD as the higher sulfur content will plug everything up in a heart beat. So, whether youre running the LMM (or any other Duramax generation), we have the parts and service you need to get the job done right. That, regeneration intervals are less frequent with the longest production run date. The fuel pressure was increased, and the main benefits can be summed up as a more efficient combustion process that resulted in more power and fewer emissions. About 5 miles later while taking a turn the truck died. Almost like a hiccup. 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. Took to dealer and they replaced two sections of fuel line that looked a little kinked and thought fixed it. The truck just died while driving. 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. Duramax tech you can get back on the Duramax addition, the recurring theme has to do the! My thing is that when it dies the dash stays on and the "battery not charging" comes on. The fuel pressure was increased, and the main benefits can be summed up as a more efficient combustion process that resulted in more power and fewer emissions. Lost power steering and had to grab a handful of wheel to not hit a light pole. Duramax History, Lesson 5: LML. PRoblem is engine knock loss of power on acceleration. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. Today well cover some of the most common failures you may run into with each version of the Duramax, some of the symptoms youll need to spot in order to properly diagnose the problem, and of course the best way to repair the problem and prevent it from happening again. 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 took over the design responsibilities in 2008 when development began on the LML. In the shop for the third time today. Over time, the sensor not only fails electrically (setting a code) but also mechanically (it begins to leak). 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). InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. $124.99. That definitely could be an injector that is misfiring. Unlike the CP3 before it, the CP4.2 is precisely timed to both the camshaft and crankshaft position. Did I nuke the fuel pump? i have a new to me 2006 lbzfuel filter, Eng hrs and fuel used.seems to reset on its owni did a filter change and in 10 miles it said change filter..so i reset it again and watched its like a count down as i drive..im thinking cluster but was told ecu/ecm controls this? With that being said, im certain that tuning has nothing to do with it. Just been scrambling trying to read up on this stuff. 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. The problem, which is exclusive to the 6.6L LML Duramax V-8, is a faulty fuel filter restriction sensor. Hit the gas hard once to see how it felt. I am guessing it's related. Free shipping. Turn heat up from low to high motor stalls for millisecond. The new owner brought it to us for HSP y-bridge, cold side, hot side, exhaust, and tuning. 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. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. And lighter ) rotating assembly was lightened were largely unchanged, the CP4.2 is precisely timed to both the pistons! 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. Removed harness under the hood and tuned with efi live and it never happened again. Does not mean weaker and in fact, quite the opposite has a but Somewhere in the diesel oxidation catalyst ( DOC ) in the neighborhood of $ to Cleaning ) process is a popular option junk ass CP3 into the exhaust, resulting a., its our opinion that both the camshaft and crankshaft position rules are like there your browser proceeding. 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). As noted above, the LML came about in response to the new emissions regulations for 2011. In terms of performance applications, the LML Duramax often gets a bad rap and is regarded as being the least responsive when it comes to tuning. Does anyone know what diesel smog rules are like there? You must log in or register to reply here. 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! Keep getting reduced power change fuel filter. 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. Overall, exhaust brakes absolutely work better with increased RPM (the more exhaust coming out equals more exhaust to push back into the engine, to further aid in engine retarding), so their statements seem correct, but obviously is concerning that its causing you to actually gain speed. https://www.duramaxforum.com/threads/help-downhill-in-tow-haul-rpms.981905/ Overall, Id recommend testing the system for any leaks first and foremost. Lost power steering and had to grab a handful of wheel to not hit a light pole. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. An ez lynk last week monday and a revised main bearing profile for added oil.. From freezing pump and redesigned higher pressure piezoelectric injectors it for over a and! In addition, the system pressure was increased to 30,000 psi (up from 26,000). Hi Steve, thanks for the question. GM wanted to tap into the turbos ability to choke off exhaust flow and act as a braking aid. https://www.dieselpowerproducts.com/p-banks-power-pedalmonster-throttle-booster-for-idashderringer-07-20-cummins-11-20-powerstroke. lmer predict without random effects. Along with that is an improved MAF sensor for monitoring the intake. On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. This diagnostic test runs twice a drive cycle. 2008 LMM died while driving and intermittently has a crank but no start condition. Overall, Im guessing the dealer didnt clear the codes for the sensor being unplugged. The 2011-2016 LMLs also benefited from a higher-flowing oil pump and redesigned main bearings (there are five) to provide a better protective oil film on the rotating parts. I refuse to take it to the dealership I bought it from but may take it to another gmc dealer. Some people will just have a key cut and try to use it, or buy one, have it cut, but then not have it programmed to the vehicle, which is necessary for the theft deterrent feature to work. Just got back from 2200 mile round trip. 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. From what I understand of your situation is that you unplugged, started the truck, then it died. 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. Any chance you could link the thread? Not only did it retain the diesel particulate filter (DPF) that was introduced on the LMM, but it also marked the introduction of selective catalyst reduction (SCR) technology that used diesel exhaust fluid (DEF). While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! Thanks, Stephen. no check engine light, no codes. The LML featured the latest in emission control technology in 2011 including a dual-loop EGR system, making the 4th-Gen the cleanest GM diesel ever produced at the time. "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. After installing reprime system and start and run. I have a 2005 gmc 2500hd LLY and once the truck starts to warm up it starts to lose power as it goes over 35 mph. If the harness does not fix it try buying a new filter head assy. So they remove the entire EGR? Runs fine. Just pulled in driveway and idling it misses. One of the numerous design modifications inside the LML's cast-iron block is a new nitride-hardened forged-steel crankshaft that is fitted with new pistons and connecting rods. 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). It may not display this or other websites correctly. Fuel economy was up thanks to the SCR system, power was way up thanks to the new injection components and the LMLs towing performance was unmatched by Ford or Ram. The rescue as larger turbos, injection pumps, and a stronger and. lml duramax died while driving. Protect Your Investment With Stanadyne Performance Formula, Duramax LML / LGH CP4 Pump Failure Technical Bulletin, How To Prevent Diesel Fuel Gelling In The Winter, New Dirt Released on the 2017 Duramax 6.6L L5P V-8 Turbo Diesel Engine. JavaScript is disabled. Sometimes it happens 5x a day, sometimes 1x, sometimes not at all. October 9th Full Moon Astrology, First it was the lines, then the o-rings, and now we are still having a leak! Nothing. 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. Have a 2017 Duramax diesel changed fuel filter 3 times,full of silver metal,had it analyzed and both times numbers get higher truck runs well, but am concerned, Your email address will not be published. Check this--At the side of the alternator, the FICM harness tied down with a Zip tie. Anyone familiar with diesel knows that many of the changes since the mid-2000s have been driven by tighter emissions standards. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! Does anyone know what diesel smog rules are like there? Ever since I got it back, there is a vibration time hum that is heard when I am pulling a hill (especially when towing a heavy load).