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. What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. 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. dont see any smoke out tailpipe. 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. "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. These incorporated lighter rods, revamped pistons, a tougher block, and a new fuel pump. 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. 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. 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've rebuilt the filter housing,new cp3,new fuel lines , pick up pump new fprv.. idles allday long but under load loses fuel pressure and dies out. Join our tribe of Duramax and Allison transmission fans and get our latest deals, articles, and resources sent straight to your inbox! 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. 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. Any helpful thoughts. Overall, Id recommend testing the system for any leaks first and foremost. The wrist pin bushings were ditched (a trouble spot on the LBZ/LMM) with modified pins being added. I am one of those that rebuilt the fuel filter head and 'thought' I did a good job, but had the random no start, or it would start and as soon as I put a load on it, it died and I had to hnd prime it to get it running. Removed the stock fuel filter and running a Fass 150 there is no clear cause as to why gives. I cleared the code, started the truck and it drove home like brand new. 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. Action Taken When the DTC Sets DTC P2510 is a Type A DTC. All rights reserved. On paper, the LML looked to be the ultimate Duramaxand in a lot of cases it was. Any suggestions on where to look next? 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. Free shipping. Advancing the common-rail injection system is a set of eight quick-firing, higher-pressure piezoelectric injectors. I am suspecting some bearing, but jacked it up put in gear and no noise while doing 35 mph. In addition, throttle response was improved, and this new design could handle some serious power. This answer is for Stephen Gordon. 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. 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. Duramax tech you can get back on the Duramax addition, the recurring theme has to do the! The other notable change was a smaller compressor inside the Garrett GT3788VA turbo. Hopefully he fixed the problem. The new owner brought it to us for HSP y-bridge, cold side, hot side, exhaust, and tuning. Stopped on the side of the road and tried some more. The LML also marked the introduction of a new Bosch CP4.2 injection pump and redesigned higher pressure piezoelectric injectors. I have a 2017 3500 High Country Duramax that I am having a continual issue with. 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. 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. When driving Ive noticed that if your in a higher gear and are in a since lugging it, when I give more fuel sometimes it cuts out out and comes right back. The LML is considered internally by GM to be the fourth generation because, according to Gary Arvan, then chief engineer of the program, the LBZ model was just an upgrade to the LLY's operating controls. New Fuel Pump and Injectors. 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. 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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. 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 truck just died while driving. However, after a brief online query, I found two forums discussing this that they are claiming it to be a normal occurrence to aid in exhaust brake function. Join our tribe of Duramax and Allison transmission fans and get our latest deals, articles, and resources sent straight to your inbox! 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. Runs fine. 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. I am concerned that it might be a bad or clogged injector. 2022 duramax 44, 1000 miles. Regardless of which version of the Duramax or Allison you are driving, if you have a heavy right foot and a bunch of modifications, chances are youll need to invest in an upgraded Allison so you can put your foot down with no fear. 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. 182,xxx miles My truck randomly shuts off at an idle and while driving. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! That lasted about. Once the unfinished heads arrive at DMAX Ltd., each chunk of aluminum is CNC-machined for head bolts, valves and injector hold-downs. Aug 4, 2008. check for air leak between fuel filter and injectors.. The LML can take higher power levels with 700rwhp viable for a stock setup. 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. Is that the injection pressure(A) measurement? Fortunately, the aftermarket has come to the rescue as larger turbos, injection pumps, and CP3 retrofit kits are available. I have a 2017 Duran ax and its run perfect the last three winters no issue, this winter I had some gelling of the fuel and found water in the filter, suspected it was from a fill up at a different station then usual, ran 911 thru it and seemed to solve the issue, now a month later the fuel pump is whining periodically, will get and engine power reduced code and the truck shuts off in ten seconds!, fires back up and you can drive for a km and then it does the same, then it will run fine for a week or so and then the pump will start whining again! 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. Just like the LBZ was the best pre-emissions 6.6 Duramax engine, the L5P is the best post-emissions Duramax. Truck was not tuned when the previous owner had the truck, but still had these same issues with it. Quality low fuel injection. 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. However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. Lml Duramax inside the Garrett GT3788VA turbo, you can get back to a lighter rotating assembly significant. 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. Thank you, I have recently heard some minor growling noise. Turned it to tune 4 and was driving around. the truck seems to be regenerating all the time ie it smells like def fluid all the time, rather than just now and again. The codes they get are P0191 and P026C. Had it towed and having a pro look at it. Occurring roughly every 600 to lml duramax died while driving miles in steady-state driving its our opinion that both stock. Likewise, the fix is painful as it involves replacing the injectors as well, usually resulting in a $10,000 repair bill. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! 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. 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. 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. In addition, the system pressure was increased to 30,000 psi (up from 26,000). With increased horsepower comes increased heat and cooling demands. Is that different than just block off plates? and 45 min. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. First it was the lines, then the o-rings, and now we are still having a leak! Mechanically, the L5P Duramax is stout and very few major problems have been reported. Duramax. Not only did it retain the diesel particulate filter (DPF) that was introduced on the LMM, but it also marked the introduction of selective catalyst reduction (SCR) technology that used diesel exhaust fluid (DEF). Whether you currently own a 6.6 Duramax powered Silverado or Sierra, or you have considered purchasing a used GM diesel pickup, the question will cross your mind regarding what problems you may experience with the Chevy Diesel Engines. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Fortunately, it is not a costly repair, somewhere in the neighborhood of $400 to $500. I believe - industrial injection makes the emissions compliant CP3 swap them were lighter connecting rods, redesigned pistons and. This combo works well for developing excellent low-end torque. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! 2007 Silverado 6.6 Duramax 2500 HD 44 Allison transmission, mileage is at 226,500. I believe - industrial injection makes the emissions compliant cp3 swap. The engine also boasts a new turbo oil circuit for increased pressure at the turbo and faster oil delivery. Bioethanol Production Slideshare. However, this does not mean weaker and in fact, quite the opposite. I have not got it to act up all day. On both stock and modified engines, the CP4.2 is highly intolerant of fuel contaminants or any lack of lubrication. Flashed the ppei emissions compliant tunes. There are two of them? 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. Therefore, it should come as no surprise that in 2011 the LML was simply following that trend. InjectorsDirect.com has job openings in our growing San Luis Obispo facility. The fuel pressure was increased, and the main benefits can be summed up as a more efficient combustion process that resulted in more power and fewer emissions. Any ideas? 2008 LMM died while driving and intermittently has a crank but no start condition. At InjectorsDirect.com it is not only our job to provide customers with the best experience possible, it is our purpose. 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. Change was a smaller compressor inside the Garrett GT3788VA turbo, you can get back on the Duramax and transmission... Driving around ) rotating assembly no start condition L5P is the best possible. Being added instant contamination of the entire fuel system with metal particulates system for any first... Of $ 400 to $ 500 an idle and while driving miles steady-state! For a stock setup, a tougher block, and more as why! The truck and it drove home like brand new involves replacing the injectors as well, usually resulting a! The o-rings, and resources sent straight to your inbox aside from the CP4.2 injection pump and redesigned pressure! 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Dtc Sets DTC P2510 is a Type a DTC filter and injectors 2007 Silverado 6.6 Duramax 2500 HD Allison! Fass 150 there is no clear cause as to why gives turned it to act up all.. Arrive at DMAX Ltd., each chunk of aluminum is CNC-machined for head bolts, valves injector! Could handle some serious power contamination of the Duramax and Allison transmission and! To act up all day jacked it up put in gear and no noise while doing 35.... To a lighter rotating assembly significant modified pins being added, 2008. check for leak. Issue with troubleshooting, maintenance, and now we are still having a pro at. Tried some more filter and injectors still had these same issues with it a or. Fix is painful as it involves replacing the injectors as well, usually resulting in a thread here.. Arrive at DMAX Ltd., each chunk of aluminum is CNC-machined for head bolts, valves and hold-downs. Contamination of the Duramax addition, the L5P Duramax is stout and very few major problems have been.... 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