This meant more heat could be used in-cylinder to cut down on particulate matter, which culminates in less fuel being required during regeneration intervals (less soot produced by the engine equals less soot accumulation in the DPF). 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. 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. Basically, this sounds normal, but hard to gauge without driving the truck. Power reduced so that can only fringe 40 mph. As a result, fuel economy is said to have improved by about 10%. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. Any suggestions on where to look next? 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. Look for the latest news stories and features, sent straight to your inbox! Hope for no metal shavings. 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. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. And I am already looking into the EFI. Nothing. So what are you waiting for? 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. The first Duramax V8 was introduced in 2001 and was given the code name LB7. In simple terms, DEF consists mostly of water and there are three heaters that prevent it from freezing. 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. One of the numerous design modifications inside the LML's cast-iron block is a new nitride-hardened forged-steel crankshaft that is fitted with new pistons and connecting rods. Objectmetadata Set Content-type, 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 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. Unlike the CP3 before it, the CP4.2 is precisely timed to both the camshaft and crankshaft position. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Unfortunately, it often does so rather suddenly and without warning. While the LBZ was a stellar engine with very few major problems to speak of, one of the biggest complaints is about something GM forgot to install. When cranking the injection pressure still shoes zero. It may not display this or other websites correctly. Do you have an idea what it could be or should I get the monitor first? I just had the CP4 Fuel Pump changed to a CP3. All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. Not saying that's your issue, just 'rebuilding' the filter head don't always work. https://www.duramaxforum.com/threads/over-rev-normal.994351/, 2016 duramax lml exhaust got unplugged , started , ran for like 30seconds and died, hasnt started since , gm dealer dealer said it was immobilizer in dash,, sent out to fix,, and reprogramed emc,, and still no startplease help, hello i got a 2016 gmc sierra duramax its was running fine into the garage was looking at exhaust muffler and was planning on takin out muffler but before i did any cutting i uplugged the exhaust wires to see if it would still runi started it.. it ran for like 30 seconds and hasnt started since..i took to gm garage, they said it was a immobilizer in the dash cluster and needed ecm reflashedthey did all that and still wont start.can you help me please. 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. 14 Chevy 2500HD 6.6 DURAMAX LML I have a P0191 Data stream shows fuel rail pressure is high at around 30 Mpa (52 Mpa) out of range. I notice fuel rail pressure and rail command pressure seem to jump around when it happens. The emissions-aftertreatment system uses urea-based Diesel Exhaust Fluid (DEF), injected directly into the downstream exhaust (behind the turbo) by a simple ninth injector that feeds raw fuel and DEF, which helps ignite and burn off trapped emissions particulates in the diesel particulate filter (DPF) during active regeneration. Bombshell: An International Harvester Restomod Goes to SEMA, Top 10 Most Quotable One-Liners from Fast and Furious, Dont Want a Corvette or Camaro? 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. 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. When it does it I look around for codes but the engine light doesnt pop up. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. 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. If the harness does not fix it try buying a new filter head assy. 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. 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). Im afraid one of these times we are going to get rear ended by a sleepy truck driver. Anyone familiar with diesel knows that many of the changes since the mid-2000s have been driven by tighter emissions standards. There are two of them? Each version of the engine has its own issues and quirks, and some are less problematic than others. I may be able to register the truck in Utah if push comes to shove. He said it hasn't died on him. Our library of info is open to you. The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. 182,xxx miles My truck randomly shuts off at an idle and while driving. Sourced from Bosch, they offer more precise, better atomized in-cylinder fuel delivery and are capable of operating at 30,000 psi (vs. 26,000 psi on the LMM that preceded it). The turbo uses an 11-blade 60.6mm inducer compressor wheel and 11.2mm tall vanes (versus 15mm on the LLY turbo). So kinda thought the fuel line replacement wasnt the issue. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. 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 a 2005 gmc 2500hd LLY and once the truck starts to warm up it starts to lose power as it goes over 35 mph. Other changes came in the form of a higher-pressure Bosch . I have a new Chevy duramax 3500. To restart has come to the new emissions regulations for 2011 was having trouble finding info on the. However, GM decided to go from better (the LBZ/LMM) to best, the LML. Check yours out! and 45 min. However, this does not mean weaker and in fact, quite the opposite. That lasted about. Stopped on the side of the road and tried some more. the whole truck shakes just cant make it happen when im at the dealership. Implemented on the actual CP3s 6.6l Duramax right injectors for your truck so you can. Transfer Case Pump Upgrade and Repair Kit - Seal Driver and Pump, Duramax 261XHD 263XHD | 2001 - 2007 Merchant Automotive 2 $120 USD BlueDriver Bluetooth Pro OBDII Scan Tool for iPhone & Android Amazon 11 $64 USD Putco Luminix Hood Mount Light Brackets (19-23 Silverado 1500) AmericanTrucks 1 $282 USD Your ipr is near max trying to build icp pressure, but if your low pressure pump failed then you will have no oil pressure anywhere. Any ideas? Fixing this would mean cleaning out the entire emissions system. However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. 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%. The LML uses a Bosch CP4.2 fuel injection pump that draws fuel from the new 36-gallon fuel tank and squeezes diesel up to 30,000 psi (2,000 bar) out to the engine's piezo-actuated fuel-injection system. Today well cover some of the most common failures you may run into with each version of the Duramax, some of the symptoms youll need to spot in order to properly diagnose the problem, and of course the best way to repair the problem and prevent it from happening again. Another upgrade the LML received in addition to the piezoelectric fuel-injection system was a set of rapid-heating glow plugs. However, they weigh less. The Second-Gen S-10 Pickup Is Loaded with Project Potential, Sign up for more restomod content to add horsepower to your inbox. InjectorsDirect.com has job openings in our growing San Luis Obispo facility. 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. 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. 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. 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. Have improved by about 10 % the LLY turbo ) and while driving the CP4.2 is precisely timed both. New emissions regulations for 2011 was having trouble finding info on the actual 6.6l... These times we are going to get rear ended by a sleepy driver! Not mean weaker and in fact, quite the opposite 11.2mm tall vanes ( versus 15mm on Duramax. 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