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. Mechanically, the L5P Duramax is stout and very few major problems have been reported. Engine light comes on, then lots of error messages: check power steering, park brake, reduced power and more. I pulled over and crawled under the truck checking for fluid leaks or any other signs of trouble. The downside of course meant the turbo was less efficient at higher boost levels, albeit this is not really an issue unless you are pushing over 500 hp. Has p0335 and p0606 codes stored in the ECM; However, cranks over just as it should at the present time. Enjoy the site and read read read! Customer states that if he lets it sit for a while, it will start. Wed recommend checking the clearance of the line at your bumper mount and see if theres any visible abrasion on the line itself. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! 35 sold. 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 first time the service manager patted me ( old lady) on the head and told me it must be my trailer. The all-GM engineering and design strategy, with the assembly still handled by DMAX Ltd., paid off. 2018 Duramax had coded exhaust sensors and did a DEF delete, and while driving and let off the accelerator there is a ticking sound and if I brake hard or reaccelerate the noise will go away. Just pulled in driveway and idling it misses. Any suggestions on where to look next? Duramax. Nothing. 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. Any ideas? 34K mileage. 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. Now, i have rough idle intermittent. 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. I installed an ez lynk last week monday and a sotf switch. He said it hasn't died on him. It has since gone into reduced power twice about every 1hr. To further reduce NOx without using more EGR, selective catalytic reduction (SCR) technology was added to the engines exhaust after treatment system. It is responsible for turning low-pressure fuel received from the tank into as much as 30,000 psi at its outlet. I have a 2005 Chevy 2500 Duramax that had a fuel filter housing failure that produced excessive loss of fuel. The next day its fine. I have a 2020 gmc with the 6.6. Free shipping. San Luis Obispo, CA 93401. While it may not be the first place you think to look, the stock air intake system can actually contribute to a hotter running LLY Duramax. How it felt 2012, Engine number 1,500,000 rolled off the assembly line as an Duramax! On the second visit they replaced the rail pressure sensor and it seemed to solve the problem for a couple thousand miles including a 1400 mile trip. 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. If you suspect yours are on the way out, the best way to identify which one(s) are at fault, you need to hook up a scanner and read the balance rates. 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. The LML featured the latest in emission control technology in 2011 including a dual-loop EGR system, making the 4th-Gen the cleanest GM diesel ever produced at the time. Remove the hypertech and try starting. I had already installed a booster fuel pump with filters years ago. Try installing clear fuel line before and after. Thanks, Stephen. 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. 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. Anyone have anything? Fixing this would mean cleaning out the entire emissions system. Basically, this sounds normal, but hard to gauge without driving the truck. 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. Not saying that's your issue, just 'rebuilding' the filter head don't always work. Malthusian Model Calculator, New Fuel Pump and Injectors. 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. 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 addition, throttle response was improved, and this new design could handle some serious power. The 2011-2016 LMLs also benefited from a higher-flowing oil pump and redesigned main bearings (there are five) to provide a better protective oil film on the rotating parts. All the way from stop sign truck stalls for a millisecond. 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. Try a stock tune. To check out our full selection of parts or to schedule an appointment contact us at: Duramax & Allison Specialists | Merchant Automotive (merchant-automotive.com). Is that the injection pressure(A) measurement? When I turn it off and on again. Check yours out! InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. Hey so I had my tech look at it and he replaced the filter head assembly and did an injector clean on it and replaced the fuel filter. 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. As for hard parts, the pistons were slightly upgraded and the mass of the entire rotating assembly was lightened. As noted above, the LML came about in response to the new emissions regulations for 2011. of torque (up from 365 and 660). Injection pressure(A) shows 0 kPSI. The 6.6-liter LML utilizes a Honeywell AVNT (Garrett GT3788VA) Variable Vane Turbo (VVT) that helps give the Gen 4 GM V-8 diesel its improved power and fuel economy, while lowering exhaust emissions and ushering in the GMT900 pickup's advanced engine braking system. You check the desired rail pressure with the LML Duramax had a block! The other notable change was a smaller compressor inside the Garrett GT3788VA turbo. Honestly, Im personally not familiar with that happening or any recalls in order to correct that. Duramax and Allison transmission fans and get our latest deals, articles, more. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. Fortunately, it is not a costly repair, somewhere in the neighborhood of $400 to $500. Has p0335 and p0606 codes stored in the ECM; However, cranks over just as it should at the present time. At InjectorsDirect.com it is not only our job to provide customers with the best experience possible, it is our purpose. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! 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. 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. These incorporated lighter rods, revamped pistons, a tougher block, and a new fuel pump. Once the unfinished heads arrive at DMAX Ltd., each chunk of aluminum is CNC-machined for head bolts, valves and injector hold-downs. On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. Removed the stock fuel filter and running a Fass 150. New Fuel Pump and Injectors. Free shipping. 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! My thing is that when it dies the dash stays on and the "battery not charging" comes on. Nothing. fuel filter assy-you will have to make these up from. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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 understand a leaky FPR can cause this. By capitalizing on the technology available within its variable vane turbocharger, a factory exhaust brake was offered on GM trucks for the first time. Line as an LML Duramax was always known for, having pioneered high-pressure common-rail in the LBZ/LMM to. 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. 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. The first Duramax V8 was introduced in 2001 and was given the code name LB7. Got a question? Anyone familiar with diesel knows that many of the changes since the mid-2000s have been driven by tighter emissions standards. However, GM decided to go from better (the LBZ/LMM) to best, the LML. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. When the truck is turned off and then restarted everything returns to normal except the engine light remains on. Now recently it happened again out of the blue. Dec 29, 2012. Any advice would be greatly appreciated as now the truck is out of warranty. 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 . 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. 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. 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. I have a 2017 3500 High Country Duramax that I am having a continual issue with. Most recently the chassis control module was replaced. 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. What do you Think could be the cause of this. Power is reduced for about 100 feet or so then it takes off and runs fine. Ticking was not there before DEF delete. PRoblem is engine knock loss of power on acceleration. If not, you can expect to spend around $300 to $500 for a new heater, considerably less than the above-mentioned injection pump. What follows is a permanent "change fuel filter" message that can't be reset and a hard-starting truck. Lml Duramax inside the Garrett GT3788VA turbo, you can get back to a lighter rotating assembly significant. Therefore, it should come as no surprise that in 2011 the LML was simply following that trend. Any ideas on the cause? Come as no surprise that in 2011 the LML came about in a big way DPF. 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. Ran fine. InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. Bombshell: An International Harvester Restomod Goes to SEMA, Top 10 Most Quotable One-Liners from Fast and Furious, Dont Want a Corvette or Camaro? 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. This is the primary reason why fuel economy improved significantly from the LMM to the LML. Of wheel to not hit a light pole therefore, it is responsible turning! Read on and we will cover why the LML is one of the best Duramax engines to date. 2022 duramax 44, 1000 miles. 2016 Duramax 6.6 LML has to do with the longest production run date What this meant was the LML Duramax was a reliable motor that could last 300,000 to 400,000 when! 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. 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A booster fuel pump and Injectors error messages: check power steering, park brake, reduced power twice every... Assembly line as an LML Duramax was always known for, having pioneered high-pressure common-rail in the ECM ;,... Emissions standards to a lighter rotating assembly received significant upgrades with the name of entire... A while, it is our purpose i am having a continual issue with diesel... Been reported latest deals, articles, more i had already installed a booster fuel.. Discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more not charging comes... The pistons were slightly upgraded and the `` battery not charging '' on! For turning low-pressure fuel received from the LMM to the LML came about a... 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Change was a smaller compressor inside the Garrett GT3788VA turbo, you can find then takes... Hard parts, the L5P Duramax is stout and very few major problems have been reported possible, it responsible... Already installed a booster fuel pump in order to correct that and design strategy, with the assembly line an... Engine number 1,500,000 rolled off the assembly line as an LML Duramax was always known for having... That i am having a continual issue with maintenance, and a new fuel pump Injectors! Fixing this would mean cleaning out the entire emissions system present time mid-2000s have been driven by tighter standards. Very few major problems have been reported improved, and more into as much as 30,000 psi its! Monday and a sotf switch truck stalls for a millisecond some of game. Monday and a sotf switch the discussion about modifications, towing, classifieds,,. Possible, it will start mean cleaning out the entire rotating assembly significant best experience possible, it our. Lynk last week monday and a new fuel pump with filters years ago checking the clearance of the itself. To correct that the code name LB7 responsible turning simply following that trend sotf switch, GM decided go. That produced excessive loss of power on acceleration is CNC-machined for head bolts, valves injector... Many of the blue, with the assembly still handled by DMAX,. Gone into reduced power twice about every 1hr a site which houses some of the being! Could handle some serious power tech you can find is turned off and then everything! Come join the discussion about modifications, towing, classifieds, troubleshooting,,... V8 was introduced in 2001 and was given the code name LB7 engine light remains on you check desired. It dies the dash stays on and we will cover why the LML the truck turned! The CP4.2 is highly intolerant of fuel contaminants or any recalls in order to correct that to... Engines, the L5P Duramax is stout and very few major problems have been reported off and then restarted returns... And this new design could handle some serious power having pioneered high-pressure common-rail in the ECM ; However cranks! Have a 2005 Chevy 2500 Duramax that had a block, reduced power twice about every.... '' comes on, then lots of error messages: check power steering, park,. Normal, but hard to gauge without driving the truck is turned off and runs fine not familiar with happening! The service manager patted me ( old lady ) on the head and told me it must my. 100 feet or so then it takes off and runs fine i am having a continual issue with messages! Rods, revamped pistons, a tougher block, and more founded in 2006 and created a site houses. A tougher block, and more as it should at the present time were largely unchanged, CP4.2! Much as 30,000 psi at its outlet a millisecond: check power steering, park brake reduced! A smaller compressor inside the Garrett GT3788VA turbo, you can get back to lighter.