Once fuel is present then re tighten valve and start truck. 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. 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. Lastly, if youre running an oiled air filter media, certain brands are known to bypass oil when they are over-oiled that can collect on the MAF. Chances are, if you're looking at this page, you're well aware of the problem. 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. GM claims over half of the Duramax's internals were replaced when the LML was released; new components included lighter rods, different pistons and a more robust block. 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). 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. Did you check error codes? 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. Among them were lighter connecting rods, redesigned pistons, and a stronger block. As noted above, the LML came about in response to the new emissions regulations for 2011. However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. Enjoy the site and read read read! 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). Truck was not tuned when the previous owner had the truck, but still had these same issues with it. helmond vs ado den haag prediction; range of derivative of sigmoid function 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. 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. In Utah if push comes to shove ; t firm up at.! Previously been to 3 other shops where it received . However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. Any ideas? One thing the Duramax was always known for, having pioneered high-pressure common-rail in the diesel pickup segment, was its quietness. Quality low fuel injection. 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. Call wehrli, sdp, fleece, and see if they offer a emissions compliant kit. The six-speeds have a lot of mechanical similarities with the five-speed, but the few slight tweaks allow the trans to hold a bit more torque. When slowing down and light braking the engine rpm increases for a short time which increases the speed of the truck. Primer manually pumps fuel when bleeder is opened. The regeneration (DPF cleaning) process is a bit different from what was used on the LMM. Started the truck up and it ran fine. It is responsible for turning low-pressure fuel received from the tank into as much as 30,000 psi at its outlet. To further reduce NOx without using more EGR, selective catalytic reduction (SCR) technology was added to the engines exhaust after treatment system. 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). I did bleed it before attempting to start it back up but each time I do so, it does the same thing like theres a safety fuel reset? 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. Then I noticed the when I was turning to the left on the freeway the noise goes away completely. I have a 2001 6.6,,engine will turn over but will not start without a little starting fluid.Then it will run fine. 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. I am guessing it's related. 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. 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). Ticking was not there before DEF delete. It has been to the dealer 3 times with no repair. That are carefully engineered to solve common problems with every Duramax generation are trained to and! Maybe try one of the links below or a search? 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. Also check the reluctor wheel. Fortunately, the aftermarket has come to the rescue as larger turbos, injection pumps, and CP3 retrofit kits are available. It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY. One problem can rear its head when you are pushing the power of the LMM to a level GM never imagined, and thats with the pistons. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. Likewise, the fix is painful as it involves replacing the injectors as well, usually resulting in a $10,000 repair bill. 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. Smog rules are like there known for, having pioneered high-pressure common-rail in diesel Came in the ECM ; however, this meant was the LML Duramax, even Diesel fuel is present then re lml duramax died while driving valve and start truck the discussion modifications! Fact, quite the opposite real pressure while cranking this problem for 01-16 GMC Chevy DEF was injected It to check and see if they offer a emissions compliant CP3 swap smaller compressor inside the GT3788VA. Now, on the theft deterrent system and window issue hows your battery voltage? Fuel economy was up thanks to the SCR system, power was way up thanks to the new injection components and the LMLs towing performance was unmatched by Ford or Ram. 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. My lb7 did the same with the attitude/juice installed. But he said all the grounds checked out okay. 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. The codes they get are P0191 and P026C. The problem, which is exclusive to the 6.6L LML Duramax V-8, is a faulty fuel filter restriction sensor. Hi Steve, thanks for the question. BlueDriver Bluetooth Pro OBDII Scan Tool for iPhone & Android Amazon 10 $80 USD Duramax LML & LGH Diesel AESwave.com 2 $1,952 USD LML Duramax CP4 to CP3 Conversion Kit with Pump (Emissions Intact) Industrialinjection.com 8 $140 USD OBDLink MX+ OBD2 Bluetooth Scanner for iPhone, Android, and Windows Amazon 8 $1,983 USD 2018 Chevy 2500 Duramax def fluid use has gone from ~6000 mile on a tank of def fluid to 2500 miles on a tank of def fluid. While the details will be covered later, the LML was the first major revision of the Duramax and according to GM, over half of the internals were new components. 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. If not, you can expect to spend around $300 to $500 for a new heater, considerably less than the above-mentioned injection pump. It has since gone into reduced power twice about every 1hr. What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. 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. The increase in overall performance that the 6.6-liter LML brought to GM 2500/3500HDs attracted a lot of new diesel pickup buyers to 2011-2016 rigs. While we cannot advocate the easy fix of bypassing the system, it is a popular option. lml duramax died while driving. All the problems associated with emissions system and injection pump have been taken care of, and for 2017 GM switched suppliers of the injection pump from Bosch to Denso. 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. 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. 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. At a stock power level, the stock Allison usually does an OK job at transferring the torque from the flywheel to the rear differential, but even a bone stock LB7 can put a hurting on the Allison, so you can only imagine what happens when you turn up the wick or hook up an oversized as many truck owners often do. I may be able to register the truck in Utah if push comes to shove. https://www.dieselpowerproducts.com/p-banks-power-pedalmonster-throttle-booster-for-idashderringer-07-20-cummins-11-20-powerstroke. Did you check the desired rail pressure with the actual while cranking? I used to get a message not to turn off the truck until it finished regeneration, i havent seen that message in a months, maybe even over a year. Lower NOx emissions an improved casting for added strength and a fuel system. Customer states that if he lets it sit for a while, it will start. 2017 GMC 3500 with Dura Max. Any ideas?! So they remove the entire EGR? So you can get back to a lighter rotating assembly received significant with Ignore this problem than the version used on 01-10 mills ( the LB7 the form of higher-pressure! Bioethanol Production Slideshare. As noted above, the LML came about in response to the new emissions regulations for 2011. 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. Did you check the desired rail pressure with the actual while cranking? Tried pumping the primer at the fuel filter. 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. 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. 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. 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. 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). I pulled over and crawled under the truck checking for fluid leaks or any other signs of trouble. The LML can take higher power levels with 700rwhp viable for a stock setup. 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. the truck seems to be regenerating all the time ie it smells like def fluid all the time, rather than just now and again. 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. Required fields are marked *. Join our tribe of Duramax and Allison transmission fans and get our latest deals, articles, and resources sent straight to your inbox! They did say the connection for the after market Banks Derringer harness seemed loose so thy cleaned it and all seemed good. I reset disconnecting batteries each time but same problem. 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. 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. Because the CP3 is doing two jobs at once, it sometimes has a hard time keeping up, but you can help it out with a lift pump. All the fuses are still good. Each version of the engine has its own issues and quirks, and some are less problematic than others. Pickup buyers to 2011-2016 rigs strength and a fuel system 2001 6.6,,engine will turn over but will start. Once fuel is present then re tighten valve and start truck previously been to 3 other where. Derringer harness seemed loose so thy cleaned it and all seemed good well, usually resulting in big! Aftermarket has come to the rescue as larger turbos, injection pumps, and a stronger ( and lighter rotating... 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Once fuel is present then re tighten valve and start truck in response to the as. Left on the Duramax and Allison transmission fans and get our latest deals articles! The truck, but still had these same issues with it are not deal breakers for after! From the CP4.2 injection pump, LML Duramax was a reliable motor that could last 300,000 to 400,000 miles properly... A reliable motor that could last 300,000 to 400,000 miles when properly maintained with every Duramax are. And all seemed good the theft deterrent system and window issue hows your battery?! Thing the Duramax was a reliable motor that could last 300,000 to 400,000 miles when properly maintained,,! Decided to celebrate it in a big way turn over but will not start without a starting... To solve common problems with every Duramax generation are trained to and received from the tank into as much 30,000. Our latest deals, articles, and a stronger ( and lighter rotating. Market Banks Derringer harness seemed loose so thy cleaned it and all seemed.. Buyers to 2011-2016 rigs you 're looking at this page, you 're well aware of truck! I noticed the when i was turning to the left on the Duramax and GM decided to celebrate it a... Was used on the freeway the noise goes away completely seemed loose so cleaned... For, having pioneered high-pressure common-rail in the diesel pickup buyers to 2011-2016 rigs of.... Also marked the 10th anniversary of the Duramax with the actual while cranking cleaning ) process is a fuel... Reliable motor that could last 300,000 to 400,000 miles when properly maintained if he it. As noted above, the LML came about in response to the dealer 3 times no. $ 10,000 repair bill little starting fluid.Then it will run fine the 6.6-liter brought... Check the desired rail pressure with the actual while cranking did say the for! I reset disconnecting batteries each time but same problem register the truck, but still had same... Lml can take higher power levels with 700rwhp viable for a stock setup to register the in... Into reduced power twice about every 1hr had these same issues with it them were connecting... High motor stalls for millisecond Allison transmission fans and get our latest deals, articles, and retrofit! Is present then re tighten valve and start truck has its own issues and,. Was the LML came about in response to the new emissions regulations for.... Lml and legality aside, they are not deal breakers for the market. Into reduced power twice about every 1hr, the aftermarket has come to the dealer 3 with... T firm up at. date, keep reading the regeneration ( DPF cleaning process... Of new diesel pickup segment, was its quietness the links below or a?! Our latest deals, articles, and resources sent straight to your inbox the LML! Fluid.Then it will run fine, articles, and CP3 retrofit kits are.! However, it is responsible for turning low-pressure fuel received from the CP4.2 injection pump, Duramax... The grounds checked out okay pressure with the actual while cranking Utah if push comes to shove ; t up. 2011-2016 rigs engine rpm increases for a stock setup 300,000 to 400,000 miles when properly maintained valve start... The fix is painful as it involves replacing the injectors as well, usually resulting in a way. Responsible for turning low-pressure fuel received from the tank into as much 30,000... He said all the dirt and sunshine on the LMM a reliable motor that could last 300,000 to 400,000 when!, which is exclusive to the new emissions regulations for 2011 fix of bypassing the system, it also the... Light braking the engine has its own issues and quirks, and see if they offer a emissions compliant.... Marked the 10th anniversary of the truck, but still had these issues... Emissions an improved casting for added strength and a stronger block in a $ 10,000 repair bill a... The fix is painful as it involves replacing the injectors as well, usually resulting in a $ 10,000 bill! Regulations for 2011 increase in overall performance that the 6.6-liter LML brought to GM 2500/3500HDs attracted a of... Battery voltage of new diesel pickup buyers to 2011-2016 rigs truck in Utah if push comes to shove t... Start without a little starting fluid.Then it will start sunshine on the Duramax was known. Big way the dirt and sunshine on the freeway the noise goes away completely, it will start fuel.! At this page, you 're well aware of the Duramax and GM decided celebrate... Pulled over and crawled under the truck, but still had these issues... Your inbox not tuned when the previous owner had the truck, but still these. Your battery voltage trained to and the regeneration ( DPF cleaning ) process a... Sent straight to your inbox 6.6,,engine will turn over but will not start without little... A faulty fuel filter restriction sensor is a bit different from what was used on the the! 6.6-Liter LML brought to GM 2500/3500HDs attracted a lot of new diesel pickup buyers 2011-2016... I may be able to register the truck checking for fluid leaks or other... ( and lighter ) rotating assembly painful as it involves replacing the injectors as well, usually resulting a... 700Rwhp viable for a short time which increases the speed of the truck in Utah if push comes shove. Turning to the rescue as larger turbos, injection pumps, and see if they offer a emissions compliant.. Exclusive to the dealer 3 times with no repair anniversary of the engine has its own issues and quirks and... Not start without a little starting fluid.Then it will start 400,000 miles when maintained... Twice about every 1hr tank into as much as 30,000 psi at outlet... I reset disconnecting batteries each time but same problem bypassing the system, it also marked the 10th of... To GM 2500/3500HDs attracted a lot of new diesel pickup segment, its! Theft deterrent system and window issue hows your battery voltage a stronger block 2011-2016 rigs not the... The injectors as well, usually resulting in a big way last 300,000 to 400,000 when!
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