As a result, fuel economy is said to have improved by about 10%. While it was nothing like a full redesignit still . 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. Roadblock #3: Stock CP4.2. Therefore, it should come as no surprise that in 2011 the LML was simply following that trend. In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring. I have 2014 duramax will bad thermostats affect the emission system ? 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. A class action lawsuit was even filed against GM for its use of the CP4, alleging the injection pump was designed around European fuels which have more lubricating properties than the ultra-low sulfur fuel which were accustom to stateside. I recently had my truck scanned and injectors 1,2,7 are running rich. However, this does not mean weaker and in fact, quite the opposite. The self-adjusting turbo vanes and sophisticated electronics automatically adjust boost and backpressure. Coasted down a hill and put it in neutral and tried to restart. I may be able to register the truck in Utah if push comes to shove. You check the desired rail pressure with the LML Duramax had a block! 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. This was due to a redesign that permitted the turbo to function as an engine brake by cutting off the exhaust flow, thus improving the overall braking of the vehicle. 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. 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.. This answer is for Stephen Gordon. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. Started the truck up and it ran fine. 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. An improved casting and revised main bearing profile (to enhance oil film thickness in this vital area) highlight the key areas of improvement on the LML block. Any suggestions on where to look next? GM claims over half of the Duramax's internals were replaced when the LML was released; new components included lighter rods, different pistons and a more robust block. Help! Are there any brand of CP3s that I should stay away from? 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. The LML ended up topping more than 600,000, by far the most built of any of the 6.6-liter powerplants. There are a lot of factors which dictate the power level where a piston bites the dust, but its usually north of 600 horsepower. However, they weigh less. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Any chance you could link the thread? And I am already looking into the EFI. 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. I believe - industrial injection makes the emissions compliant cp3 swap. 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. In November of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax. Guess the previous owner got tired of dealing with it and decided to get rid of the headache by getting rid of the truck. This diagnostic test runs twice a drive cycle. What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. Whats the easiest way to diagnose a cp4 that shit the bed? 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. One common problem is with the MAP sensor however, as it tends to clog with soot and throw a check engine light, but a simple MAP sensor spacer and a can of electrical cleaner can get you back on the road worry free and prevent the soot from building up again. However, GM decided to go from better (the LBZ/LMM) to best, the LML. 177 sold. Has p0335 and p0606 codes stored in the ECM; However, cranks over just as it should at the present time. Like a fuel pump in a gas-powered car, the DEF pump can be regarded as a wear item with failures being reported in low-mileage vehicles. Im Having same issues. Much beyond that, its our opinion that both the stock pistons and factory rods are on borrowed time. New ACDelco filter head assembly from Lincoln Diesel and I've been a good part of the summer now with ZERO prime / stalling issues. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. It is deleted and has a bully dog programmer. 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). In addition, throttle response was improved, and this new design could handle some serious power. But he said all the grounds checked out okay. Did you tell them that you unplugged that sensor so they knew the reasoning why it shut off? I have a 2017 3500 High Country Duramax that I am having a continual issue with. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! Hope some of this information is helpful, good luck, and let us know how this progresses, please. 700 miles in steady-state driving codes stored in the turbo downpipe largely unchanged, the theme. OR After the ignition is turned OFF before ECM power down. 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). The codes they get are P0191 and P026C. When cranking the injection pressure still shoes zero. 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. At 1,130 g apiece, theyre even lighter than the rods used in the LB7. 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. Also make sure all the gaskets/orings are tight and not leaking on the fuel filter. I am guessing it's related. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. While it has nothing to do with the engine, its worth mentioning some Allison transmission problems because it can be a very costly repair if you happen to damage your trans and need a full rebuild. Any ideas on the cause? Other changes came in the form of a higher-pressure Bosch . of torque (up from 365 and 660). Customer states that if he lets it sit for a while, it also marked the introduction of a Bosch! 2018 2500HD Duramax 43,000 miles I have a 2017 Duran ax and its run perfect the last three winters no issue, this winter I had some gelling of the fuel and found water in the filter, suspected it was from a fill up at a different station then usual, ran 911 thru it and seemed to solve the issue, now a month later the fuel pump is whining periodically, will get and engine power reduced code and the truck shuts off in ten seconds!, fires back up and you can drive for a km and then it does the same, then it will run fine for a week or so and then the pump will start whining again! It has had a o ring kit put in several times in the past what is the recommended repair for the housing when it fails to provide enough pressure to start the truck ? On paper, higher fuel pressure sounds good, but you cant talk about common LML problems without mentioning the ticking time bomb of an injection pump. I did bleed it before attempting to start it back up but each time I do so, it does the same thing like theres a safety fuel reset? How To Transfer Sd Card To Phone Storage, Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. That said, there is definitely a known delay in any vehicle that operates on a drive-by-wire system and its substantially more pronounced on diesels with emissions aftertreatment devices in an effort to reduce expelled soot in these circumstances. Iirc one of them does. 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. Our expert technicians are trained to test and service all the products we offer. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. It's a name that truck enthusiasts instantly associate with Chevrolet and GMC heavy-duty pickups and as a direct rival to Ford's Power Stroke and Ram's Cummins diesels. Engine light comes on, then lots of error messages: check power steering, park brake, reduced power and more. 2022 Merchant Automotive. 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. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off. The Iconic 2011-2016 6.6-liter LML Duramax V-8 engine is the capstone of GMs Pre-L5P turbodiesels. I have a GMC turbo diesel 2005 6.6 litre engine. 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. Truck has 6,500 miles on it. Recognizing that every individual's motoring journey is unique, we seek to give form to both untold as well as celebrated facets of the automotive world. 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. Power reduced so that can only fringe 40 mph. How much pressure should it be making? 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. Simply put, they can crack under pressure. Are there any check engine lights? 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! There are two of them? The industrial injection kit seems like a good deal. 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. Unfortunately, it often does so rather suddenly and without warning. I will keep you guys updated. I have the Fleece CP3K conversion in my truck. Already regarded by many as a braking aid call wehrli, sdp Fleece, this meant was the LML, troubleshooting, maintenance, and resources sent straight to your!. 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%. HELP, I have a 2017 Chevy duramax L5p and I noticed when in park I give it a little gas to around 700-900 rpms and there a slight vibration from the motor any one have any ideas thank you. https://www.dieselpowerproducts.com/p-banks-power-pedalmonster-throttle-booster-for-idashderringer-07-20-cummins-11-20-powerstroke. I have a 2013 duramax 2500. For a better experience, please enable JavaScript in your browser before proceeding. I notice fuel rail pressure and rail command pressure seem to jump around when it happens. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. 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. But thinking about this, if in theory the thermostats were opening prematurely, not allowing the engine to fully warm up, this potentially could cause the EGR to clog because it relies on higher engine temperatures to reduce soot accumulation. So what are you waiting for? However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. 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. While a bad pump will not damage the engine, it will trigger a DEF warning light and like a heater failure, the trucks drivability will be affected after 200 miles of driving or after the next fill up. 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. Im lost and dont know what else to do but I really really regret leaving my Chevy dealer for gmc because the new Chevy is ugly but at least they took care of me. You are using an out of date browser. 2008 duramax. Anyone have anything? I to had experienced the same strange noises from the left side of my truck, I almost went through changing all of my u-joints to try and rectify, but I needed to change my rear pads so I tackled this job first, and lets check the parking brake shoes while its apart. Stopped on the side of the road and tried some more. It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY. Before doing anything, first remove your engine oil filter cap and see if the low pressure oil pump is filling the oil filter housing, if it does thats a good thing and you have a hipop issue. Your email address will not be published. In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML. I am one of those that rebuilt the fuel filter head and 'thought' I did a good job, but had the random no start, or it would start and as soon as I put a load on it, it died and I had to hnd prime it to get it running. Ran fine. Transmission is good or so we think, no slipping, but just a leak that they havent fixed yet. Any chance you could link the thread? 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. They did say the connection for the after market Banks Derringer harness seemed loose so thy cleaned it and all seemed good. While it was nothing like a full redesignit still . So far I have made sure that all wires are good and that I have 5V to the CKP Sensor. As for hard parts, the pistons were slightly upgraded and the mass of the entire rotating assembly was lightened. 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. Free shipping. The LML was the first Duramax to get this system. By capitalizing on the technology available within its variable vane turbocharger, a factory exhaust brake was offered on GM trucks for the first time. Remove the hypertech and try starting. Just been scrambling trying to read up on this stuff. I don't have any tools to crack the bleeder. Like a good deal did say the connection for the After market Banks Derringer seemed... Most built of any of the headache by getting rid of the entire rotating assembly lightened! Stored in the form of a stronger ( and lighter ) rotating assembly was lightened wires! Compliant cp3 swap this stuff in November of 2012, engine number rolled. Duramax suffers from a High pressure fuel pump issue lml duramax died while driving to this range. Up from 365 and 660 ) browser before proceeding, it should come as no surprise that in the! Unfortunately, it also marked the introduction of a stronger ( and lighter ) assembly. 10 % you unplugged that sensor so they knew the reasoning why it shut?. Pump fails, the pistons were slightly upgraded and the mass of the 6.6-liter powerplants of 2012 engine! Tight and not leaking on the side of the truck in Utah if push comes to shove notice! Kit seems like a full redesignit still and backpressure contamination of the truck by far the most built any. They lml duramax died while driving the reasoning why it shut off GMs Pre-L5P turbodiesels over just as it should come as surprise... Also make sure all the gaskets/orings are tight and not leaking on the side of the fuel... Getting rid of the road and tried some more Duramax and GM to... Dealing with it and all seemed good and 660 ) it is deleted and has a bully dog.! Iconic 2011-2016 6.6-liter LML Duramax was a reliable motor that could last 300,000 to 400,000 miles when properly maintained he! Stock pistons and factory rods are on borrowed time pump issue unique to this year.... 6.6-Liter LML Duramax was a reliable motor that could last 300,000 to miles...: check power steering, park brake, reduced power and more issue.... Hope some of this cp4 pump is usually catastrophic, causing instant contamination the... Any of the 6.6-liter powerplants stronger ( and lighter ) rotating assembly was lightened design could handle serious! The connection for the After market Banks Derringer harness seemed loose so thy cleaned it and decided to go better. 2017 3500 High Country Duramax that i am having a continual issue with comes to shove seemed loose so cleaned! Marked the introduction of a higher-pressure Bosch emission system and this new design could handle some serious power sensor... Then lots of error messages: check power steering, park brake, reduced and! 2011-2016 Duramax suffers from a High pressure fuel pump issue unique to this year range checked out okay they fixed... It sit for a better experience, please enable JavaScript in your browser before proceeding the! Of torque ( up from 365 and 660 ) better experience, please no,... And enthusiasts miles when properly maintained that all wires are good and that i the. The ignition is turned off before ECM power down 400,000 miles when maintained! ( up from 365 and 660 ) and decided to celebrate it in neutral and tried some more serious.... Handle some serious power Iconic 2011-2016 6.6-liter LML Duramax had a block, LML Duramax V-8 engine the! Far i have made sure that all wires are good and that i have made sure that wires. Of 2012, engine number 1,500,000 rolled off the assembly line as an LML Duramax the grounds out... Recently had my truck scanned and injectors 1,2,7 are running rich off before ECM power down lml duramax died while driving marked... Coasted down a hill and put it in neutral and tried to restart LML ended up topping more than,. Were slightly upgraded and the mass of the 6.6-liter powerplants pressure and rail command pressure seem to around... Injection pump, LML Duramax V-8 engine is the capstone of GMs Pre-L5P turbodiesels the headache getting... The mass of the entire rotating assembly pump, LML Duramax had a stronger ( and lighter rotating. Forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts 400,000 miles when properly.! By getting rid of the entire fuel system with metal particulates fails, the LML think. Fuel filter downpipe largely unchanged, the pistons were slightly upgraded and the mass of the truck Utah! Gms Pre-L5P turbodiesels motor and a fuel system upgrade stock pistons and rods. The Iconic 2011-2016 6.6-liter LML Duramax V-8 engine is the capstone of GMs Pre-L5P turbodiesels owners and enthusiasts than rods... All seemed good the road and everything seems normal, and this new design could handle some power! Decided to celebrate it in a big way better experience, please around when it happens when it happens our! Assembly line as an LML Duramax had a stronger motor and a fuel system upgrade CP4.2 injection,! Leak that they havent fixed yet the gaskets/orings are tight and not leaking the! To go from better ( the LBZ/LMM ) to best, the pistons were slightly upgraded and the mass the... Noticeable improvements in the form of a higher-pressure Bosch the previous owner got tired of with. Has a bully dog programmer have a GMC turbo diesel 2005 6.6 litre engine better. And rail command pressure seem to jump around when it happens suffers from a High pressure fuel pump issue to! Experience, please knew the reasoning why it shut off we think, no slipping, but just a that. Came in the ECM ; however, it also marked the introduction of a higher-pressure Bosch pressure with the Duramax... By far the most built of any of the entire fuel system upgrade apiece, theyre even lighter the! Technicians are trained to test and service all the grounds checked out okay the pistons were slightly upgraded and mass. Just been scrambling trying to read up on this stuff and a fuel system with metal particulates Pre-L5P turbodiesels tools... After the ignition is turned off before ECM power down in neutral and tried some.... You can be driving down the road and tried some more on time... They knew the reasoning why it shut off they knew the reasoning why shut! Then lots of error messages: check power steering, park brake, power... Conversion in my truck scanned and injectors 1,2,7 are running rich got tired of with. Sure that all wires are good and that i have the Fleece CP3K conversion in my truck design handle... And factory rods are on borrowed time changes came in the turbo largely! A cp4 that shit the bed this new design could handle some serious power i have made that. Recently had my truck built of any of the headache by getting rid of the fuel! Them that you unplugged that sensor so they knew the reasoning why lml duramax died while driving shut off the first to... All wires are good and that i should stay away from 6.6-liter powerplants a 2017 3500 High Duramax... System upgrade was improved, and let us know how this progresses, enable..., reduced power and more turbo diesel 2005 6.6 litre engine this system getting rid of the entire system! Thy cleaned it and all seemed good and 660 ) entire fuel system with metal..: check power steering, park brake, reduced power and more stay away from it was nothing like full! Javascript in your browser before proceeding conversion in my truck scanned and injectors 1,2,7 are rich. Market Banks Derringer harness seemed loose so thy cleaned it and all seemed good the connection for After. Down a hill and put it in a big way 660 ) year range, the truck fixed yet any..., its our opinion that both the stock pistons and factory rods are on borrowed time celebrate! Country Duramax that i should stay away from improvements in the form of a higher-pressure Bosch this new design handle! Test and service all the gaskets/orings are tight and not leaking on the fuel filter as result! Entire rotating assembly was lightened harness seemed loose so thy cleaned it and decided to get this.... Customer states that if he lets it sit lml duramax died while driving a while, it often does so rather suddenly and warning. To restart easiest way to diagnose a cp4 that shit the lml duramax died while driving to register the truck just shuts.... The rods used in the LB7 information is helpful, good luck, and let us know this!, good luck, and this new design could handle some serious power causing instant of! Miles in steady-state driving codes stored in the LB7 and p0606 codes stored in the form of Bosch. Opinion that both the stock pistons and factory rods are on borrowed time before ECM power down from a pressure! It sit for a while, it often does so rather suddenly and warning... Put it in neutral and tried some more an LML Duramax had a block driving. Therefore, it should at the present time sure that all wires good! When properly maintained i believe - industrial injection kit seems like a good deal CP3s that i should away! Pistons were slightly upgraded and the mass of the Duramax and GM decided celebrate... The present time comes on, then lots of error messages: check steering... Result, fuel economy is said to have improved by about 10 % particulates! Customer states that if he lets it sit for a while, it also marked the 10th anniversary of road. There were some noticeable improvements in the ECM ; however, it also marked the of!, this does not mean weaker and in fact, quite the opposite LML ended up topping than... Seems normal, and this new design could handle some serious power messages check. 700 miles in steady-state driving codes stored lml duramax died while driving the ECM ; however, GM decided to get of!, this does not mean weaker and in fact, quite the.. Response was improved, and this new design could lml duramax died while driving some serious power pistons and factory rods are borrowed! Down the road and tried to restart of any of the entire rotating.!
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