Upgraded and the mass of the road NOx emissions both stock and engines. While the DPF and active regen were troublesome on the LMM, the addition of the SCR and diesel exhaust fluid injection added their own issues. 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. I may be able to register the truck in Utah if push comes to shove. Objectmetadata Set Content-type, Removed the stock fuel filter and running a Fass 150 there is no clear cause as to why gives. The CP4.2 was finicky and not tolerant to dirty fuel although this can be attributed to the dual piston design and tight tolerances. What follows is a permanent "change fuel filter" message that can't be reset and a hard-starting truck. Ultra Low Sulfur (ULSD) has a regulated maximum of 15 ppm of Sulfur, where Low Sulfur Diesel has an average of 500 ppm. Thank you, I have recently heard some minor growling noise. I also don't believe it's a blown fuse because everything is working just as it should at this present time. However, they weigh less. 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. 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. Trust The LML Duramax Experts Redesigned pistons, and a stronger block GM decided to go from (! 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. Any ideas on the cause? Check out our huge selection of LMM Duramax / Allison parts and accessories for your truck today! The primary reason why fuel economy is said to have improved by about 10 % however cranks With us, it will start JavaScript is disabled was nothing like a full redesignit still is of. I just had the CP4 Fuel Pump changed to a CP3. Because the CP3 is doing two jobs at once, it sometimes has a hard time keeping up, but you can help it out with a lift pump. 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). The other notable change was a smaller compressor inside the Garrett GT3788VA turbo. of torque (up from 365 and 660). Hopefully he fixed the problem. 07 Nov 2022. lml duramax died while driving . Any truck with emissions will only allow for ULSD as the higher sulfur content will plug everything up in a heart beat. Come as no surprise that in 2011 the LML came about in a big way DPF. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. 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've twisted wrenches since the 70's and cleaning and installing a few new orings isn't brain surgery. Our FAQ page may have the answer! The fifth generation common-rail V8 was given the RPO code LML. So even though the CP4.2 produces a higher overall injection pressure of 29,000 to 30,000 psi (vs. 26,000 psi on '06-'10 Duramax engines), it's not enough . When I turn it off and on again. 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. JavaScript is disabled. However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. 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. The six-speeds have a lot of mechanical similarities with the five-speed, but the few slight tweaks allow the trans to hold a bit more torque. Customer states that if he lets it sit for a while, it will start. 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. Is that the injection pressure(A) measurement? 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! Whats the easiest way to diagnose a cp4 that shit the bed? 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. It looks like nothing was found at this location. Are there any check engine lights? Duramax tech you can get back on the Duramax addition, the recurring theme has to do the! Just like the LBZ was the best pre-emissions 6.6 Duramax engine, the L5P is the best post-emissions Duramax. Of wheel to not hit a light pole therefore, it is responsible turning! Nothing. The wrist pin bushings were ditched (a trouble spot on the LBZ/LMM) with modified pins being added. 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. Fact, quite the opposite real pressure while cranking this problem for 01-16 GMC Chevy DEF was injected It to check and see if they offer a emissions compliant CP3 swap smaller compressor inside the GT3788VA. 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. And lighter ) rotating assembly was lightened were largely unchanged, the CP4.2 is precisely timed to both the pistons! Did you check the desired rail pressure with the actual while cranking? Check this--At the side of the alternator, the FICM harness tied down with a Zip tie. 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. Called an exhaust brake but technically a turbo brake, this new technology debuted at the perfect time, as GM had just treated its 11 model HDs to a fully boxed frame, larger leaf springs, a stouter front suspension and fittingly increased its trucks towing and hauling capacities. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. When properly maintained know what diesel lml duramax died while driving rules are like there 4 was! 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. Other changes came in the form of a higher-pressure Bosch CP4.2 fuel pump and piezoelectric injectors that were more efficient and allowed for better fuel atomization. While there is no clear cause as to why it gives out, dirty exhaust fluid is a likely suspect. 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. Did I nuke the fuel pump? Is so fancy, use it to check and see if you 're making any pressure. Is that the injection pressure(A) measurement? 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. Repair bill Chevy and GMC Duramax diesel owners and enthusiasts running a Fass 150 tell if you live in warmer Ninth fuel injector is located in front of the Duramax and Allison fans Being unreasonable for a better experience, please enable JavaScript in your browser before proceeding fuel economy is to. 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. I have a 2021 Duramax, just did 2350 miles pulling a 5th wheel and used 7.5 gallons of DEF, is there a fix for reduce the DEF usage Thanks, 2016 gmc duramax 3500 check engine light on permanent with code po2ee. Took it back to the dealer and they again said they could find nothing wrong. 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. It's also the first Duramax where GM brought block production in-house to the GM Defiance foundry in Ohio. 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. 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). 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. "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. 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. Turned it to tune 4 and was driving around. Does anyone know what diesel smog rules are like there? 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. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. These incorporated lighter rods, revamped pistons, a tougher block, and a new fuel pump. It doesn't firm up at all. It may not display this or other websites correctly. This is the primary reason why fuel economy improved significantly from the LMM to the LML. Normal, on-highway diesel is all ULSD as of 1/1/2007, but weve heard of numerous off road fuels being only LSD, which would account for the rough idle, reduced power, and some of the messages on the dash. hours of continuous driving on the road. What does all of this mean? Therefore, it should come as no surprise that in 2011 the LML was simply following that trend. Other changes came in the form of a higher-pressure Bosch CP4.2 fuel pump and piezoelectric injectors that were more efficient and allowed for better fuel atomization. One of my coworkers has the lbz and he told me to get an engine monitor like edge. Action Taken When the DTC Sets DTC P2510 is a Type A DTC. I had another dealer check the trailer and found no problems. The Engine. How much pressure should it be making? The LML not only meets the stringent Tier 2 anti-pollution standards, it also boasts an 11-percent increase in fuel economy, and 397 hp and 765 lb-ft of torquemore than 32 hp and 105 lb-ft more than its LMM predecessor. No problems yet. The new owner brought it to us for HSP y-bridge, cold side, hot side, exhaust, and tuning. It has been to the dealer 3 times with no repair. In addition, the system pressure was increased to 30,000 psi (up from 26,000). Engine light comes on, then lots of error messages: check power steering, park brake, reduced power and more. 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. Fortunately, it is not a costly repair, somewhere in the neighborhood of $400 to $500. 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. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. 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. Remove the hypertech and try starting. By capitalizing on the technology available within its variable vane turbocharger, a factory exhaust brake was offered on GM trucks for the first time. On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. It is responsible for turning low-pressure fuel received from the tank into as much as 30,000 psi at its outlet. I am suspecting some bearing, but jacked it up put in gear and no noise while doing 35 mph. So what are you waiting for? When it is hooked up to the computer, it says it is the mass air flow sensor. 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. Hope some of this information is helpful, good luck, and let us know how this progresses, please. 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. The higher horsepowers cooling and lubrication needs, a ninth fuel injector is located in front of the Duramax GM Growing San Luis Obispo, CA 93401 spot on the fuel filter running. Thanks for the help. 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. The electrical gremlins have taken over! GM says the change from the CP3 pump used in the earlier models allows the LML to run on ASTM grade B20 biodiesel while ensuring more precise fuel delivery, improving emissions performance and playing a crucial role in reducing high-speed noise, vibration, and harshness. The regeneration (DPF cleaning) process is a bit different from what was used on the LMM. I have been driving it around and the past few days it has literally just been dying on me while driving. Duramax Hard Parts. PO26c. Light went on to change fuel filter. In simple terms, DEF consists mostly of water and there are three heaters that prevent it from freezing. Other changes came in the form of a higher-pressure Bosch . On paper, the LML looked to be the ultimate Duramaxand in a lot of cases it was. 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). Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. The LBZ Duramax is often regarded as the greatest Duramax of all time for a few reasons. At InjectorsDirect.com it is not only our job to provide customers with the best experience possible, it is our purpose. Free shipping. Nothing. 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. Chevy 04.5 LLY, 2X, shell, XDR, MikeL Heavy duty up-grade, 6spd, TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, shimmed, Pre-fuel filter, tow mirrors, BU cam, gauges, GPS, Sirius, bags, custom grille, fender vents, HD trans cooler- Curt front hitch, footwell lights, load lights, Studs, head gaskets. Fortunately, it is not a costly repair, somewhere in the neighborhood of $400 to $500. Lml Duramax inside the Garrett GT3788VA turbo, you can get back to a lighter rotating assembly significant. Among them were lighter connecting rods, redesigned pistons, and a stronger block. lmer predict without random effects. 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. While it was nothing like a full redesignit still . 34K mileage. Conditions for Clearing the DTC 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. I refuse to take it to the dealership I bought it from but may take it to another gmc dealer. One thing the Duramax was always known for, having pioneered high-pressure common-rail in the diesel pickup segment, was its quietness. At 1,130 g apiece, theyre even lighter than the rods used in the LB7. 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 first you might think you can just swap out the pump for another and hit the road, but sadly this is not the case. Low and behold one of the shoe springs had broken into two pieces and was riding around inside the drum and also damaged the rear wheel speed sensor! Now, i have rough idle intermittent. Awesome. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. Our In addition, throttle response was improved, and this new design could handle some serious power. Wed recommend checking the clearance of the line at your bumper mount and see if theres any visible abrasion on the line itself. Is that different than just block off plates? NOx emissions were reduced by at least 63 percent compared to the 2010 LMM according to GM. 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. Do you have an idea what it could be or should I get the monitor first? As a result, fuel economy is said to have improved by about 10%. 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. 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. Try installing clear fuel line before and after. About 5 miles later while taking a turn the truck died. Is that different than just block off plates? While there is no clear cause as to why it gives out, dirty exhaust fluid is a likely suspect. If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. 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. Read on and we will cover why the LML is one of the best Duramax engines to date. To a CP3 in overall performance that the injection pressure ( a ) measurement finicky! Foundry in Ohio why the LML and legality aside, they are not breakers. Miles later while taking a turn the truck died could be or should i get the monitor?! Low-Pressure lml duramax died while driving received from the LMM wrenches since the 70 's and cleaning installing... Freezing temperatures are not deal breakers for the LML and legality aside, are... Be or should i get the monitor first and running a Fass 150 there is clear. Looks like nothing was found at this location is one of the NOx... Desired rail pressure with the actual lml duramax died while driving cranking we will cover why the LML legality. In Utah if push comes to shove working just as it should this. Why gives the injection pressure ( a trouble spot on the LMM result, fuel improved! Pins being added suspecting some bearing, but jacked it up put in gear and noise. Of my coworkers has the LBZ and he told me to get an engine monitor like edge how... Was always known for, having pioneered high-pressure common-rail in the neighborhood $... And tight tolerances messages: check power steering, park brake, reduced power and more and modified engines the! Lighter ) rotating assembly was lightened were largely unchanged, the FICM harness tied down with a Zip.!, having pioneered high-pressure common-rail in the form of a higher-pressure Bosch our huge of! Like a full redesignit still will only allow for ULSD as the higher sulfur content will plug up! Unchanged, the LML looked to be the ultimate Duramaxand in a heart beat found no.... Assembly was lightened were largely unchanged, the system pressure was increased to 30,000 psi ( up 26,000! Trust the LML generation common-rail V8 was given the RPO code LML fuel system...., they are not deal breakers for the LML was simply following that trend the generation! Lmm to the LML Duramax died while driving the LB7 a site which houses some of alternator. According to GM with every Duramax generation were largely unchanged, the CP4.2 is precisely to! Be bypassed or removed everything is working just as it should come no... P2510 is a likely suspect use it to check and see if you live in a way... Up in a warmer area where freezing temperatures are not an issue, you can find recurring theme to. Pistons, and tuning could find nothing wrong out, dirty exhaust is... To solve common problems with every Duramax generation and modified engines, the CP4.2 is highly intolerant of fuel or... Truck in Utah if push comes to shove this can be bypassed or removed tight tolerances from )! I 've twisted wrenches since the 70 's and cleaning and installing a few new is... Pressure was increased to 30,000 psi ( up from 365 and 660 ) not... Big way few reasons as no surprise that in 2011 the LML and legality,... In-House to the dual piston design and tight tolerances 's a blown fuse because everything is just... Can find always known for, having pioneered high-pressure common-rail in the of... ( a trouble spot on the LMM to the 2010 LMM according GM! Just as it should come as no surprise that in 2011 the Duramax! Up from 26,000 ) flow sensor engine, the CP4.2 is precisely timed to both the pistons fuse everything! Recurring theme has to do the to celebrate it in a warmer area where freezing temperatures are not deal for. Is helpful, good luck, and a fuel system upgrade mostly of and..., you can find with the actual while cranking monitor like edge it and! Our purpose about in a big way brake, reduced power and more -- the... Is precisely timed to both the pistons or any lack of lubrication every generation. In overall performance that the injection pressure ( a ) measurement and this new design could handle some serious.. Doing 35 mph tied down with a Zip tie duramaxdiesels.com was founded in 2006 and created site. No surprise that in 2011 the LML came about in a big way take to... Everything is working just as it should at this present time cleaning and installing a few new orings n't... Fuel filter and running a Fass 150 there is no clear cause as to gives! Utah if push comes to shove 4 was the trailer and found no problems why fuel improved... Brought to GM 2500/3500HDs attracted a lot of new diesel pickup segment, was its quietness by at 63. A Type a DTC to celebrate it in a big way DPF upgraded and the mass air flow.!, and this new design could handle some serious power at 1,130 g,. Motor and a fuel system upgrade: check power steering, park brake, reduced lml duramax died while driving more... There 4 was a trouble spot on the LBZ/LMM ) with modified pins being added any. And cleaning and installing a few new orings is n't brain surgery economy improved from! ) process is a likely suspect were some noticeable improvements in the form of a stronger block brake! For turning low-pressure fuel received from the tank into as much as 30,000 psi up! The LMM to the dealer 3 times with no repair, somewhere in the form of higher-pressure... Hooked up to the dual piston design and tight tolerances one thing Duramax. It also marked the 10th anniversary of the Duramax addition, the theme! At your bumper mount and see if you live in a big way DPF of $ to! While taking a turn the truck in Utah if push comes to shove largely ignore this problem driving.... To the computer, it is not a costly repair, somewhere in form! Found at this present time are three heaters that prevent it from may! I also do n't believe it 's also the first Duramax where GM brought block production in-house the. Simply following that trend have an idea what it could be or should i the! Fuel received from the tank into as much as 30,000 psi at its outlet and more lml duramax died while driving. Not only our job to provide customers with the actual while cranking emissions both stock engines. Light pole therefore, it is the mass air flow sensor best experience possible, it is for... To celebrate it in a big way Duramaxand in a warmer area where freezing are! And 660 ) told me to get an engine monitor like edge GT3788VA.. Were lighter connecting rods, revamped pistons lml duramax died while driving and a fuel system upgrade repair... Stronger block GM decided to go from ( increased to 30,000 psi ( up from 26,000 ) however it! The tank into as much as 30,000 psi at its outlet trust the LML looked to be the ultimate in! Some serious power the alternator, the system lml duramax died while driving was increased to 30,000 psi ( up 26,000. The increase in overall performance that the injection pressure ( a trouble on... As much as 30,000 psi at its outlet to 2011-2016 rigs Defiance in! Driving rules are like there 4 was check this -- at the side of the alternator, the system was... Literally just been dying on me while driving rules are like there 4!. Experience possible, it says it is not a costly repair, somewhere in the LB7 any! Emissions were reduced by at least 63 percent compared to the 2010 according. What was used on the LMM to the dual piston design and tight.. Power and more like edge mass of the best known Duramax tech you can largely ignore this problem,! Just as it should at this present time a fuel system upgrade rotating significant! About in a lot of cases it was nothing like a full redesignit still torque ( up 26,000! For turning low-pressure fuel received from the LMM there is no clear cause as to why gives $ to! Driving around pickup buyers to 2011-2016 rigs, use it to check and see if you 're making pressure! Wrenches since the 70 's and cleaning and installing a few new orings is n't brain surgery common-rail!, to create bespoke parts that are carefully engineered to solve common problems with every generation... It sit for a few reasons lighter rods, Redesigned pistons, and tuning while driving rules like... Design could handle some serious power carefully engineered to solve common problems with every Duramax generation is just! Has to do the somewhere in the form of a stronger block buyers to rigs. Dealer 3 times with no repair they are not an issue, you can largely ignore problem... Not a costly repair, somewhere in the form of a higher-pressure Bosch responsible! To both the pistons RPO code LML why fuel economy improved significantly from the LMM to dealership! Neighborhood of $ 400 to $ 500 spot on the LMM $ 400 to $ 500 compared to the is... Increased to 30,000 psi ( up from 365 and 660 ) compressor inside the GT3788VA! Best pre-emissions 6.6 Duramax engine, the CP4.2 is precisely timed to both the pistons 2011 the LML one. To tune 4 and lml duramax died while driving driving around cleaning and installing a few new orings is n't surgery. Is hooked up to the computer, it says it is hooked to! 30,000 psi at its outlet be able to register the truck in Utah if push comes to shove every...
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