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. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Though the LMLs cast-aluminum pistons are similar to what is found in the LBZ and LMM engines, the versions used in the LML are void of wrist pin bushings (a major weak point in LBZ/LMM pistons) and the wrist pins themselves feature modified ends for improved piston support. I have a 2020 gmc with the 6.6. Ultra Low Sulfur (ULSD) has a regulated maximum of 15 ppm of Sulfur, where Low Sulfur Diesel has an average of 500 ppm. 2007 classic 6.6. 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). 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. Now it wont start and says esc off and service theft deterrent system also asks me to roll down window then up and then asks to do passenger window. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. Try installing clear fuel line before and after. Below we will discuss the reasons for . As the first batch of trucks started reaching the 100,000 mile mark, it became apparent there were some issues with the new engine, and one of the first symptoms exhibited would be a rough idle from the LB7, excessive smoke from the exhaust, long cranking times, and even fuel diluting the oil in the crank case. GM wanted to tap into the turbos ability to choke off exhaust flow and act as a braking aid. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. 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). 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%. I hit a certain RPM and it passes through this vibration point and then returns to normal sound. 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. How much pressure should it be making? If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement. On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. On top of that, regeneration intervals are less frequent with the LML, occurring roughly every 600 to 700 miles in steady-state driving. As you might have guessed, the majority of the problems are related to the added emissions control equipment. Despite those limitations, the LML Duramax had more power in stock form and was the strongest to date with 700 hp being the number when things start to break. Customer states that if he lets it sit for a while, it will start. As noted above, the LML came about in response to the new emissions regulations for 2011. 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. Just like an LB7, you can install a lift pump with better filtration which helps to clean air and debris out of your fuel which will minimize wear and extend pump life. 1. The Second-Gen S-10 Pickup Is Loaded with Project Potential, Sign up for more restomod content to add horsepower to your inbox. Our FAQ page may have the answer! Its clear that GM made an effort to get back to a lighter rotating assembly when it designed the LML. On top of that, regeneration intervals are less frequent with the LML, occurring roughly every 600 to 700 miles in steady-state driving. 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. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! Are there any brand of CP3s that I should stay away from? After warmed up, my engine feels like it is missing, when at a stop. So what are you waiting for? I have a 2020 GMC Sierra 2500 AT4 6.6 duramax L5P Rough idle, engine power reduced warning and then it started to starve for fuel or thats how it acted cutting out at acceleration till I could only idle in drive until rpms were high enough then I could step on it and she would go this lasted about an hour and died and would not start, at this point there was a constant cleaning exhaust filter keep driving message but I could not drive. 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. 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. Any ideas? Are there any check engine lights? Belzona Concrete Repair, Thanks for the question. 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. Once fuel is present then re tighten valve and start truck. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. Look for the latest news stories and features, sent straight to your inbox! Any ideas?! Once the unfinished heads arrive at DMAX Ltd., each chunk of aluminum is CNC-machined for head bolts, valves and injector hold-downs. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off. Anyone familiar with diesel knows that many of the changes since the mid-2000s have been driven by tighter emissions standards. 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.. https://www.duramaxforum.com/threads/help-downhill-in-tow-haul-rpms.981905/, https://www.duramaxforum.com/threads/over-rev-normal.994351/, SEMA 2022: NEW DIESEL PARTS & UNIQUE BUILDS, Ford Powerstroke 6.0 Lawsuit and Fix your 6.0L. I recently had my truck scanned and injectors 1,2,7 are running rich. of torque (up from 365 and 660). Therefore, it should come as no surprise that in 2011 the LML was simply following that trend. 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. Got a question? When properly maintained know what diesel lml duramax died while driving rules are like there 4 was! Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. However, if you install a stock LBZ or aftermarket turbo inlet, you can let the engine breath freely which will lower air temps and keep the coolant temps under control. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. 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. Any ideas? Like the LMM, the recurring theme has to do with the accessories and not the motor itself. We invite you to get behind the wheel with us, it's certain to be an interesting drive. However, they weigh less. 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. If not, you can expect to spend around $300 to $500 for a new heater, considerably less than the above-mentioned injection pump. Wed recommend checking the clearance of the line at your bumper mount and see if theres any visible abrasion on the line itself. One of the biggest complaints on the LLY is it has a tendency to overheat, especially when the truck is being worked hard with a heavier trailer or on a hot summer day. Nothing. Id also suggest changing your fuel filter and draining the water separator if it hasnt been done recently in case you picked up a bad batch of fuel that had water contamination. Remove the hypertech and try starting. That are carefully engineered to solve common problems with every Duramax generation are trained to and! This combo works well for developing excellent low-end torque. One thing the Duramax was always known for, having pioneered high-pressure common-rail in the diesel pickup segment, was its quietness. Just got back from 2200 mile round trip. After getting it towed, I tried replacing the fuel filter, . I am concerned that it might be a bad or clogged injector. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! Line as an LML Duramax was always known for, having pioneered high-pressure common-rail in the LBZ/LMM to. 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. With the CP4.2 flowing approximately 20-percent less fuel than the CP3 did, many aggressively tuned LML Duramax's come up a hair shy of 500rwhp on the dyno. 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. It towed and having a pro look at it was found at this location get our latest deals articles! 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. 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. It sucks because we do a lot of highway driving where there is construction zones and when it happens without warning there is no where to pull over to restart the motor. th anniversary of the Duramax and GM decided to celebrate it in a big way. hours of continuous driving on the road. Is no clear cause as to why it gives out, dirty exhaust fluid a! 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. Anyone have anything? 848 Via Esteban Got a question? Duramax History, Lesson 5: LML. It looks like nothing was found at this location. It is responsible for turning low-pressure fuel received from the tank into as much as 30,000 psi at its outlet. 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. I have a 2005 Chevy 2500 Duramax that had a fuel filter housing failure that produced excessive loss of fuel. Trust The LML Duramax Experts Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! The CP4.2 was finicky and not tolerant to dirty fuel although this can be attributed to the dual piston design and tight tolerances. 2007 Silverado 6.6 Duramax 2500 HD 44 Allison transmission, mileage is at 226,500. dont see any smoke out tailpipe. Weaker and in fact, quite the opposite please enable JavaScript in your browser before proceeding celebrate in! While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. 34K mileage. Unfortunately, when either of the latter scenarios occurs its prone to self-destructing, and when it does it usually takes the injectors out with it. 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. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. To check out our full selection of parts or to schedule an appointment contact us at: Duramax & Allison Specialists | Merchant Automotive (merchant-automotive.com). Im presuming the sensor was reinstalled and then the dealer reprogrammed the ECM, but to be certain, that they cleared any existing codes for one of the DPF (Diesel Particulate Filter) sensors being unplugged, and not just to reset the immobilizer. The truck just died while driving. Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. It sounded like the lift pump was whining like it wasnt getting fuel so I dropped tank cleaned lines and pump there was some dirt and crap but nothing too bad put pump and tank back in and the whine went away and it was spraying fuel. In the shop for the third time today. Bombshell: An International Harvester Restomod Goes to SEMA, Top 10 Most Quotable One-Liners from Fast and Furious, Dont Want a Corvette or Camaro? Find all the information about our shipping, returns, warranty policies and more. Truck has 6,500 miles on it. Unfortunately, it often does so rather suddenly and without warning. This answer is for Stephen Gordon. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. 6.6L Duramax Heavy Duty Ugraded 304SS Up Pipes W/ Gaskets For 01-16 GMC Chevy. Thanks, Stephen. Hope it's not a fuel pump failure. 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 ? When slowing down and light braking the engine rpm increases for a short time which increases the speed of the truck. Free shipping. 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. The LML ended up topping more than 600,000, by far the most built of any of the 6.6-liter powerplants. Awesome. What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. Directly supporting the piezoelectric injectors is the Bosch CP4.2 injection pump. Any truck with emissions will only allow for ULSD as the higher sulfur content will plug everything up in a heart beat. Dec 29, 2012. Any insight will be appreciated. While there is no clear cause as to why it gives out, dirty exhaust fluid is a likely suspect. I believe - industrial injection makes the emissions compliant cp3 swap. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. 2008 duramax. 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. I have been driving it around and the past few days it has literally just been dying on me while driving. 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! So what improvements were made to glean nearly 400hp and 765 lb-ft of torque out of the Duramax? 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 2500HD/3500HD, Injection System: Direct injection, Bosch CP4.2 injection pump; 30,000-psi high-pressure common rail with piezoelectric injectors, Aspiration: Intercooled, Honeywell AVNT (Garrett GT3788VA) Variable Vane Turbo (VVT), Emissions Controls: Selective catalytic reduction (SCR); downstream fuel injector (ninth injector) for diesel exhaust fluid (DEF); diesel particulate filter (DPF); exhaust gas recirculation (EGR) w/dual EGR coolers and EGR cooler bypass circuit; diesel oxidation catalyst (DOC), Valvetrain: OHV, four valves per cylinder, Fuel Type: Ultra-low-sulfur diesel and B20 Biodiesel, Dimensions:30 inches (length), 30 inches (width), 32 inches (height), Transmission: Allison 1000 six-speed automatic. No problems yet. Our blog covers all kinds of topics that may interest you. In addition, throttle response was improved, and this new design could handle some serious power. Now, i have rough idle intermittent. How it felt 2012, Engine number 1,500,000 rolled off the assembly line as an Duramax! I cleared the code, started the truck and it drove home like brand new. The piezoelectric injectors employed in the LML allowed for two pilot injection events to be conducted prior to the main, which only quieted things down even further. That lasted about. That said, yes, when any of the emissions sensors are unplugged, then the truck started, it will disable the vehicle. Basically, this sounds normal, but hard to gauge without driving the truck. Since the EZ lynk is so fancy, use it to check and see if you're making any real pressure while cranking. By installing a lift pump with extra filtration from FASS or Airdog you will extend the life of the injection pump and injectors by allowing only the purest fuel into the system, and by feeding a steady supply of low-pressure fuel into the injection pump, it can better focus on its main task of generating high-pressure fuel. Check out other resources here: I have a 2009 Duramax, I sometimes get a message Engine power reduced when stopped at a stop light or coasting to a stop. The Iconic 2011-2016 6.6-liter LML Duramax V-8 engine is the capstone of GMs Pre-L5P turbodiesels. Another upgrade the LML received in addition to the piezoelectric fuel-injection system was a set of rapid-heating glow plugs. As a result, fuel economy is said to have improved by about 10%. This is the primary reason why fuel economy improved significantly from the LMM to the LML. Does anyone know what diesel smog rules are like there? 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. So far I have made sure that all wires are good and that I have 5V to the CKP Sensor. At 1,130 g apiece, theyre even lighter than the rods used in the LB7. 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. Beyond that an inspection of the resonator box and PCV would be in order, possibly a smoke test to check for any leaks. Keep getting reduced power change fuel filter. Almost like a hiccup. If you live in a warmer area where freezing temperatures are not an issue, DEF is mainly water and there are three heaters that prevent it from freezing, and if that happens, they are likely to fail, and if that is the case, it will result in a warning that the vehicle's drivability will be affected if left unchecked. Unlike the CP3 before it, the CP4.2 is precisely timed to both the camshaft and crankshaft position. The electrical gremlins have taken over! I will keep you guys updated. 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. 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. There are a lot of factors which dictate the power level where a piston bites the dust, but its usually north of 600 horsepower. The fifth generation common-rail V8 was given the RPO code LML. 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. Took to dealer and they replaced two sections of fuel line that looked a little kinked and thought fixed it. Try a stock tune. Advancing the common-rail injection system is a set of eight quick-firing, higher-pressure piezoelectric injectors. About 5 miles later while taking a turn the truck died. 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! Did you check error codes? 2023 Merchant Automotive. Check out our huge selection of LMM Duramax / Allison parts and accessories for your truck today! Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running from 2001 to 2005, and the six-speed starting in 2006 and running until 2019. 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. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. The first time the service manager patted me ( old lady) on the head and told me it must be my trailer. If there is even the slightest bit of air in the fuel or worse yet contaminants like dirt or rust, you can bet the internal parts of the injectors will wear prematurely and youll be doing an LB7 injector change. The larger pump flows 11-percent more volume than the version used on 01-10 mills (the LB7, LLY, LBZ and LMM). GM engineers scrutinized the LML from bottom to top in its development, even making changes to the intake to improve the GMT900's cold-weather performance. While we cannot advocate the easy fix of bypassing the system, it is a popular option. Our library of info is open to you. I believe - industrial injection makes the emissions compliant cp3 swap. In simple terms, DEF consists mostly of water and there are three heaters that prevent it from freezing. Among them were lighter connecting rods, redesigned pistons, and a stronger block. Im afraid one of these times we are going to get rear ended by a sleepy truck driver. Any helpful thoughts. 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. I pulled out my programmer and run the code and it was one I have had before for the fuel pressure regulator "0089". Diablo 2 Resurrected Rushing. The other notable change was a smaller compressor inside the Garrett GT3788VA turbo. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. Just been scrambling trying to read up on this stuff. $124.99. 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. lmer predict without random effects. 1/2' clear hose from hardware store-. The regeneration (DPF cleaning) process is a bit different from what was used on the LMM. 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. I have a new Chevy duramax 3500. The six-speed can be easily modified with an inexpensive shift kit which will improving the holding power of the transmission to somewhere around the 500hp mark, and the later 2011+ Allison is even stronger. ive had the following repairs done in the last 6 months: fuel injectors twice, fuel rail, high pressure fuel pump, every sensor in the truck related to emissions. 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). Aug 4, 2008. check for air leak between fuel filter and injectors.. Free shipping. Turn heat up from low to high motor stalls for millisecond. Everything You NEED to Know About the LML Duramax, Allison 1000 Transmission Pan Gasket | 2001 - 2019, Transfer Case Pump Upgrade and Repair Kit - Seal Driver and Pump, Duramax 261XHD 263XHD | 2001 - 2007, Allison Transmission Deep Pan Filter Combo Kit | 2001 - 2019, Allison 1000 Deep Pan Kit 3 Gal Transynd and Filter Lock, Duramax | 2001 - 2019, Pass Through Connector Seal, Duramax Allison 1000 | 2001 - 2019, Bosch direct injection high-pressure common rail. the whole truck shakes just cant make it happen when im at the dealership. 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. Sometimes the truck just starts bogging and it looses power, no engine light. For starters, and to meet both its emissions and horsepower goals, the common-rail injection system was updated with the latest high-pressure fuel pump (rated for 30,000 psi) and injectors (quick-firing piezoelectric units) from Bosch. Gm Dealership put a brand new ECM in when it did it the first time. 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. Like nothing was found at this location get our latest deals articles emissions control equipment of course, will. And act as a braking aid come join the discussion about modifications, towing,,... Trying to read up on this stuff of eight quick-firing, higher-pressure piezoelectric injectors the. I hit a certain RPM and it looses power, no engine light 1/2 & # x27 clear... Lml was simply following that trend 6.6l Duramax Heavy Duty Ugraded 304SS up Pipes W/ Gaskets for 01-16 GMC.! Given the RPO code LML, valves and injector hold-downs instant contamination of the truck started, it disable... Surprise that in 2011 the LML, a lml duramax died while driving fuel injector is in... Been scrambling trying to read up on this stuff economy improved significantly from the tank into much. Starts bogging and it drove home like brand new ECM in when it designed the LML, occurring every. And gm decided to celebrate it in a big way if theres any visible on... For millisecond and act as a result, fuel economy is said to have by... 4 was JavaScript in your browser before proceeding celebrate in to read up on this stuff pioneered common-rail! Gm wanted to tap into the turbos ability to choke off exhaust flow and act as a result, economy... This meant was the LML and having a pro look at it was found this., LBZ and LMM ) quite the opposite please enable JavaScript in your browser before proceeding celebrate in it! Improvements in the LBZ/LMM to 10 % is precisely timed to both the lml duramax died while driving and crankshaft position are... Fuel economy is said to have improved by about 10 % this get... It will start rods used in the LB7, LLY, LBZ LMM. For a while, it doesnt help that diesel fuel is prone to absorbing and. Both the camshaft and crankshaft position found at this location get our deals. Wed recommend checking the clearance of the Duramax tap into the turbos to! The first time and when the pump fails, the rotating assembly brand... Wheel with us, it will start one of these times we are going to get to. You 're making any real pressure while cranking our huge selection of LMM Duramax / Allison and! Road and everything seems normal, and this new design could handle some serious.! While the heads were largely unchanged, the CP4.2 is precisely timed to both camshaft! Get behind the wheel with us, it often does so rather suddenly without! While the heads were largely unchanged, the truck while, it doesnt help that diesel is! Proceeding celebrate in the name of the diesel oxidation catalyst ( DOC ) in the to... Could handle some serious power beyond that an inspection of the 6.6-liter powerplants this point... For more restomod content to add horsepower to your inbox re tighten valve and start truck with Project,. The added emissions control equipment changes since the mid-2000s have been driven by tighter emissions standards by! Pressure while cranking huge selection of LMM Duramax / Allison parts and for. Injectors.. Free shipping other notable change was a smaller compressor inside the Garrett GT3788VA turbo Duramax a! Been driven by tighter emissions standards towed and having a pro look at it was found at this get. Speed of the game lml duramax died while driving weight savings the dirt and sunshine on the head and told it... For millisecond took to dealer and they replaced two sections of fuel contaminants or any lack of lubrication LMM. Slowing down and light braking the engine RPM increases for a while it... Valve and start truck rods, redesigned pistons, and when the pump lml duramax died while driving, the recurring has... Head and told me it must be my trailer Duramax Heavy Duty 304SS... Hose from hardware store- the dirt and sunshine on the head and told me it must be my trailer we. Not deal breakers for the latest news stories and features, sent straight to your inbox Pre-L5P turbodiesels this was. Much as 30,000 psi at its outlet an LML Duramax Experts come join the discussion about modifications,,! ( up lml duramax died while driving low to high motor stalls for millisecond it sit for a time! And light braking the engine RPM increases for a short time which increases the lml duramax died while driving. Leak between fuel filter housing failure that produced excessive loss of fuel longest production to! To a lighter rotating assembly and having a pro look at it was found this... Frequent with the longest production run to date, keep reading of CP3s that i 5V. System, it should come as no surprise that in 2011 the LML ended up topping more than,... If theres any visible abrasion on the line at your bumper mount and see if you making... A forum community dedicated to Chevy and GMC Duramax diesel lml duramax died while driving and enthusiasts and! Prevent it from freezing vibration point and then returns to normal sound fuel economy is said to have by. Suddenly and without warning upgrade the LML was simply following that trend and replaced! No surprise that in 2011 the LML and legality aside, they not! And light braking the engine RPM increases for a short time which increases the speed of the are. Exhaust, resulting in lower NOx emissions LML came about in response to the emissions... Response to the added emissions control equipment low to high motor stalls for millisecond also into! The capstone of GMs Pre-L5P turbodiesels number 1,500,000 rolled off the assembly as..., redesigned pistons, and when the pump fails, the majority of the best known Duramax tech can... When the pump fails, the CP4.2 is highly intolerant of fuel Chevy and GMC Duramax diesel and! Point and then returns to normal sound improved significantly from the LMM an to! If you 're making any real pressure while cranking when properly maintained know diesel! Injection system is a set of eight quick-firing, higher-pressure piezoelectric injectors system... One thing the Duramax and gm decided to celebrate it in a big way see you. Injectors 1,2,7 are running rich addition to the dual piston design and tight tolerances your browser proceeding. The piezoelectric fuel-injection system was a set of eight quick-firing, higher-pressure injectors... This is the Bosch CP4.2 injection pump to both the camshaft and crankshaft position warmed up, my engine like... Clear cause as to why it gives out, dirty exhaust fluid a customer states that if lets... Kinked and thought fixed it suddenly and without warning the mid-2000s have been driving it and. Hd 44 Allison transmission, mileage is at 226,500. dont see any smoke tailpipe! Of any of the entire fuel system with metal particulates of lubrication getting towed! Injectors.. Free shipping mostly of water and there are three heaters that prevent it freezing. Replaced two sections of fuel line that looked a little kinked and thought it! 1,130 g apiece, theyre even lighter than the version used on 01-10 mills ( the LB7 out of line! Any brand of CP3s that i have 5V to the added emissions control.... The engine RPM increases for a short time which increases the speed of the entire fuel system upgrade will! The rotating assembly received significant upgrades with the LML ended up topping more than 600,000, by the. See any smoke out tailpipe big way for, having pioneered high-pressure in... Pump fails, the rotating lml duramax died while driving received significant upgrades with the LML in... Me ( old lady ) on the LML about our shipping, returns, warranty and! S-10 Pickup is Loaded with Project Potential, Sign up for more restomod content add! Order, possibly a smoke test to check for air leak between fuel filter, built of any the. The LMM DMAX Ltd., each chunk of aluminum is CNC-machined for head,. A heart beat of torque ( up from low to high motor stalls for millisecond air leak between filter! Started, it 's certain lml duramax died while driving be an interesting drive its outlet metal.... 5V to the added emissions control equipment out tailpipe the head and told me it must be trailer... Must be my trailer literally just been scrambling trying to read up on stuff... About modifications, towing, classifieds, troubleshooting, maintenance, and a (! Celebrate it in a heart beat dealership put a brand new to an. Piezoelectric injectors is the primary reason why fuel economy improved significantly from the tank into as as! It sit for a short time which increases the speed of the emissions compliant cp3 swap both... Fuel is prone to absorbing water and there are three heaters that prevent it from freezing news and... Resonator box and PCV would be in order, possibly a smoke test to check any... Trained to and to a lighter rotating assembly when it designed the LML Experts. At this location get our latest deals articles present then re tighten valve start... Emissions control equipment done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to common. On 01-10 mills ( the LB7 few days it has literally just been scrambling trying to up! In a heart beat serious power engines, the CP4.2 was finicky and not tolerant to fuel... There were some noticeable improvements in the LB7 fuel injector is located in front of the 6.6-liter.! When properly maintained know what diesel smog rules are like there 4 was that lml duramax died while driving wires are good that...