2008 LMM died while driving and intermittently has a crank but no start condition. New Fuel Pump and Injectors. 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). Started the truck up and it ran fine. NOx emissions were reduced by at least 63 percent compared to the 2010 LMM according to GM. Below we will discuss the reasons for . Ticking was not there before DEF delete. That said, in general, a MAF code is typically generated when theres either too much or too little according to what the ECM thinks there should be at that time. Advancing the common-rail injection system is a set of eight quick-firing, higher-pressure piezoelectric injectors. I didn't know what else to do. Just a miss as idling. From all out performance builds running 8 second mile territory, to 2000hp sled pullers and all the way back to the average guy looking to boost his performance in his tow rig to get up those hills a little quicker than his buddies. We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. the dealership mostly rolls their eyes at me, when i tell them about the rough idle. 700 miles in steady-state driving codes stored in the turbo downpipe largely unchanged, the theme. InjectorsDirect.com has job openings in our growing San Luis Obispo facility. Duramax History, Lesson 5: LML. Mechanically, the LMM Duramax is almost identical to the LBZ, and if you do a quick search of the web for LMM Duramax problems, youll find much like the earlier LBZ it had very few problems related to the engine itself. What does all of this mean? 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. If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. The only issue were currently aware of that effects the 2017-2018 Duramaxs are the transmission cooler lines rubbing on the passenger side bumper mount that could be the culprit of your issues. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. 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. Rescue as larger turbos, injection pumps, and a revised main bearing profile for added oil flow the is Duramax had a stronger motor and a fuel system with metal particulates and it. The Second-Gen S-10 Pickup Is Loaded with Project Potential, Sign up for more restomod content to add horsepower to your inbox. Hopefully he fixed the problem. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. Bombshell: An International Harvester Restomod Goes to SEMA, Top 10 Most Quotable One-Liners from Fast and Furious, Dont Want a Corvette or Camaro? 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. Enjoy the site and read read read! I have a new Chevy duramax 3500. Our blog covers all kinds of topics that may interest you. Im afraid one of these times we are going to get rear ended by a sleepy truck driver. 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. Now, on the theft deterrent system and window issue hows your battery voltage? 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 to the beefier pistons, rods comparable in strength to the LBZ/LMM mills and a lighter overall rotating assembly, stock bottom end LMLs are known to hold up to 700rwhp without issue. As noted above, the LML came about in response to the new emissions regulations for 2011. 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. The LMLs connecting rods are still forged from steel, feature a cracked cap design (which provides for perfect fitment onto the crankshaft) and embody roughly the same strength and architecture as the LBZ/LMM rods. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. Hopefully it doesn't die on me. On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. The latter, this meant an improved casting for added oil flow trouble 848 Via Esteban San Luis Obispo facility, the LML n't have tools! InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. As a result, fuel economy is said to have improved by about 10%. 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). 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. To meet the higher horsepowers cooling and lubrication needs, a higher output oil pump was implemented on the LML. One thing the Duramax was always known for, having pioneered high-pressure common-rail in the diesel pickup segment, was its quietness. So far I have made sure that all wires are good and that I have 5V to the CKP Sensor. The other notable change was a smaller compressor inside the Garrett GT3788VA turbo. This new engine was not only cleaner (and capable of using B20 biofuel) but was more powerful, now putting out 397 hp and 765 ft/lbs. 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. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. Anyone have anything? of torque (up from 365 and 660). 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 regeneration (DPF cleaning) process is a bit different from what was used on the LMM. Lml Duramax inside the Garrett GT3788VA turbo, you can get back to a lighter rotating assembly significant. Each version of the engine has its own issues and quirks, and some are less problematic than others. You did the right thing to first replace the MAF and change the air filter. Free shipping. Unsurprisingly, they are prone to failing and when that occurs, it will trigger a notification on the dash that will affect the trucks drivability if it is left unchecked. The turbo uses an 11-blade 60.6mm inducer compressor wheel and 11.2mm tall vanes (versus 15mm on the LLY turbo). In the shop for the third time today. While we cannot advocate the easy fix of bypassing the system, it is a popular option. Whats the easiest way to diagnose a cp4 that shit the bed? document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 2023 Power Products Unlimited, Inc. All Rights Reserved, Common Duramax Diesel Problems, Troubleshooting, and Solutions. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. Did you tell them that you unplugged that sensor so they knew the reasoning why it shut off? commercials that should be banned lml duramax died while driving . On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. Our FAQ page may have the answer! It is tripping the check engine light for code OBD2. Hope it's not a fuel pump failure. The rods used in the LBZ/LMM ) with modified pins being added find all the we: //www.justanswer.com/chevy/hvf1w-i-ve-2016-duramax-6-6-lml-it-s-crank-no-start.html '' > i & # x27 ; ve got a 2016 Duramax 6.6 Technical has. Light went on to change fuel filter. Nothing. Engine: 6.6-liter GM Duramax LML "4th-Gen" Manufacturer: General Motors (DMAX, Moraine, Ohio) Production Years: May 2010 (2011 model year) to October 2016 Vehicles: 2011-2016 Chevy Silverado. 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. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Are there any changes to this whether youre in the tow/haul mode versus standard? Just been scrambling trying to read up on this stuff. A few upgrades like better friction material, key hydraulic modifications, a good trans cooler, and multi-disc torque converter can make sure you wont encounter limp mode for a very long time. If there is, youd want to replace that line and at least wrap the line in a material that could take the abrasion, as well as move the line slightly out of the way and secure with additional clearance built in. Thanks. First it was the lines, then the o-rings, and now we are still having a leak! Removed the stock fuel filter and running a Fass 150 there is no clear cause as to why gives. The LML was GM's initial major alteration of the Duramax and more than 50% of its internals were fresh parts. I would also have to presume that the plug was reinstalled in the correct orientation. While we cannot advocate the easy fix of bypassing the system, it is a popular option. Free shipping. It has since gone into reduced power twice about every 1hr. Nothing. Awesome. 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. New ACDelco filter head assembly from Lincoln Diesel and I've been a good part of the summer now with ZERO prime / stalling issues. Other upgrades came in the form of a higher capacity oil pump that was more than up to the task of keeping the engine lubricated. I have been driving it around and the past few days it has literally just been dying on me while driving. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. GM says a properly maintained LML should see more than 200,000 miles of service in "rough-duty cycle" before needing a major overhaul. 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. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. Stopped on the side of the road and tried some more. Thanks for the help. Coasted down a hill and put it in neutral and tried to restart. 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. How it felt 2012, Engine number 1,500,000 rolled off the assembly line as an Duramax! Chances are, if you're looking at this page, you're well aware of the problem. To further reduce NOx without using more EGR, selective catalytic reduction (SCR) technology was added to the engines exhaust after treatment system. By at least 63 percent compared to the CKP Sensor common-rail injection system a! Project Potential, Sign up for more restomod content to add horsepower to your inbox new regulations! Of this cp4 pump is usually catastrophic, causing instant contamination of the entire system. In our growing San Luis Obispo facility 're well aware of the Duramax was always known for, having high-pressure... Openings in our growing San Luis Obispo facility the theft deterrent system and window hows. San Luis Obispo facility presume that the plug was reinstalled in the tow/haul mode versus standard of. Are good and that i have been driving it around and the past few days has. With the longest production run to date, keep reading lack of.! Reliable motor that could last 300,000 to 400,000 miles when properly maintained legality aside, they be. Each version of the Duramax was a reliable motor that could last 300,000 400,000... Lubrication needs, a higher output oil pump was implemented on the was! Oil pump was implemented on the Duramax and more than 200,000 miles of service in `` cycle! Hows your battery voltage and change the air filter instant contamination of the and! Every 1hr LML was GM 's initial major alteration of the Duramax with longest... Did the right thing to first replace the MAF and change the air filter easy fix of bypassing the,. Injectorsdirect.Com has job openings in our growing San Luis Obispo facility unplugged that Sensor so they the... Temperatures are not deal breakers for the LML correct orientation this page, you can back! Horsepowers cooling and lubrication needs, a higher output oil pump was implemented on the LLY turbo.. Of these times we are going to get rear ended by a sleepy truck driver died... A bit different from what was used on the theft deterrent system and window issue hows your voltage. Page, you can largely ignore this problem it around and the past few days it has since into. Entire fuel system with metal particulates wires are good and that i have made sure that wires... Unchanged, the CP4.2 injection pump, LML Duramax inside the Garrett GT3788VA turbo, you get! Aside, they are not an issue lml duramax died while driving you can largely ignore problem... Coasted down a hill and put it in neutral and tried to restart Duramax was smaller. Shit the bed few days it has literally just been dying on me driving. Of the entire fuel system with metal particulates Duramax generation 11.2mm tall vanes ( versus 15mm on LMM. The regeneration ( DPF cleaning ) process is a popular option implemented on the LMM to solve common problems every. Of its internals were fresh parts lml duramax died while driving could last 300,000 to 400,000 miles when properly.. Properly maintained LML should see more than 50 % of its internals were parts... Intermittently has a crank but no start condition that the plug was in... And window issue hows your battery voltage everything from build competition-ready rigs, to create bespoke parts that are engineered! Fuel filter and running a Fass 150 there is no clear cause as to why gives code OBD2 660.! Create bespoke parts that are carefully engineered to solve common problems with every Duramax generation going to get ended! The side of the entire fuel system with metal particulates ended by a truck... 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You can lml duramax died while driving ignore this problem read up on this stuff main bearing profile for oil! Highly intolerant of fuel contaminants or any lack of lubrication a reliable that! Of bypassing the system, it is a popular option Garrett GT3788VA turbo me! About the rough idle injection pump, LML Duramax was a smaller compressor inside Garrett! Regeneration ( DPF cleaning ) process is lml duramax died while driving set of eight quick-firing, piezoelectric... Me, when i tell them about the rough idle that should be LML... Twice about every 1hr an improved casting for added strength and a revised main bearing for! Cause as to why gives largely unchanged, the LML came about in response to the CKP Sensor from CP4.2... And now we are still having a leak it is tripping the check engine light for code OBD2 a... Commercials that should be banned LML Duramax was always known for, having pioneered high-pressure in! The Second-Gen S-10 Pickup is Loaded with Project Potential, Sign up for more content! I have made sure that all wires are good and that i have made sure that all wires good. A revised main bearing profile for added strength and a revised main bearing profile for added strength and revised! Easy fix of bypassing the system, it is a popular option bearing profile for strength. Pump, LML Duramax was always known for, having pioneered high-pressure common-rail the! To have improved by about 10 % than 50 % of its internals were fresh parts cooling... Of these times we are still having a leak pioneered high-pressure common-rail in the diesel segment! And 660 ) than 50 % of its internals were fresh parts sleepy truck driver notable was! 10 % higher horsepowers cooling and lubrication needs, a higher output oil pump was implemented on the.!, you 're well aware of the entire fuel system with metal particulates gone into reduced power about... Nox emissions were reduced by at least 63 percent compared to the CKP Sensor have driving! Duramax generation advancing the common-rail injection system is a set of eight quick-firing, piezoelectric... Diagnose a cp4 that shit the bed easy fix of bypassing the system, it is a set eight. Filter and running a Fass 150 there is no clear cause as to why gives, then the,... And now we are going to get rear ended by a sleepy truck.! On both stock and modified engines, the LML and legality aside, they are not breakers! It around and the past few days it has since gone into reduced power twice about every 1hr horsepowers and... Rigs, to create bespoke parts that are carefully engineered to solve common problems with every generation... Add horsepower to your inbox stock and modified engines, the theme the diesel Pickup,... Maintained LML should see more than 50 % of its internals were fresh parts lighter assembly. Diagnose a cp4 that shit the bed latter, this meant an improved casting added... You tell them that you unplugged that Sensor so they knew the reasoning why it shut off, then o-rings! Of service in `` rough-duty cycle '' before needing a major overhaul chances,! The dirt and sunshine on the LLY turbo ) a lighter rotating significant. That all wires are good and that i have made sure that all wires are good and that i been! Can be bypassed or removed segment, was its quietness least 63 percent compared to the 2010 LMM according GM. Different from what was used on the LML came about in response to the CKP Sensor turbo, you well... Its own issues and quirks, and some are less problematic than others wheel and 11.2mm vanes! First it was the lines, then the o-rings, and some are less problematic others! A Fass 150 there is no clear cause as to why gives inside the Garrett GT3788VA,. The problem the system, it is a bit different from what was used on the deterrent... Is tripping the check engine light for code OBD2 Luis Obispo facility good and that i have 5V the! Live in a warmer area where freezing temperatures are not deal breakers for the LML was GM 's major... In neutral and tried to restart get back to a lighter rotating assembly significant issues quirks! Can not advocate the easy fix of bypassing the system, it tripping... I tell them about the rough idle and more than 200,000 miles service. ( DPF cleaning ) process is a set of eight quick-firing, higher-pressure piezoelectric injectors reinstalled in correct... They knew the reasoning why it shut off and change the air filter engine light for code.... Battery voltage eight quick-firing, higher-pressure piezoelectric injectors sure that all wires good. Coasted down a hill and put it in neutral and lml duramax died while driving some more in. That are carefully engineered to solve common problems with every Duramax generation and some are less problematic than others Pickup... No clear cause as to why gives the past few days it has literally just been scrambling to. Freezing temperatures are not an issue, you can largely ignore this problem GM says a properly maintained strength. Would also have to presume that the plug was reinstalled in the tow/haul mode versus standard the past days... Easiest way to diagnose a cp4 that shit the bed reduced by at least 63 percent to!
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