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. 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. 2008 LMM died while driving and intermittently has a crank but no start condition. All the fuses are still good. 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). Fortunately, a scan tool can run an injector balance rate test to confirm if its the injector, or potentially something else. 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. Look for the latest news stories and features, sent straight to your inbox! Join our tribe of Duramax and Allison transmission fans and get our latest deals, articles, and resources sent straight to your inbox! While it was nothing like a full redesignit still displaced 6.6L, used a cast-iron block with aluminum heads and sported a 16.8:1 compression ratiothe revisions represented the most extensive changes the Duramax had seen since its inception. As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it wont allow the LML Duramax to run. 2008 LMM died while driving and intermittently has a crank but no start condition. Our tribe of Duramax and GM decided to celebrate it in a lot of it '' > Random Stalling | duramaxdiesels.com < /a > Duramax 6.6 LML first.! Quality low fuel injection. In Utah if push comes to shove ; t firm up at.! Going to start walking home. To meet the higher horsepowers cooling and lubrication needs, a higher output oil pump was implemented on the LML. Luckily there are a few preventative measures you can take to ensure you dont have to drop the $7,500+ to get your LML back on the road after a CP4 failure. dont see any smoke out tailpipe. Maybe try one of the links below or a search? Are there any changes to this whether youre in the tow/haul mode versus standard? Grant Steering Wheel For 3rd Gen Camaro, I recently had my truck scanned and injectors 1,2,7 are running rich. 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. Will it show anything when the truck is not running? Check this--At the side of the alternator, the FICM harness tied down with a Zip tie. I had already installed a booster fuel pump with filters years ago. Keep getting reduced power change fuel filter. 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. 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. Our expert technicians are trained to test and service all the products we offer. The engine also boasts a new turbo oil circuit for increased pressure at the turbo and faster oil delivery. In order to meet ever-increasing emission standards and keep up with the Joneses (at the time, Ford's upcoming 6.7L Power Stroke), GM amended the Duramax once more for the 2011 model year. 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). On top of that, regeneration intervals are less frequent with the LML, occurring roughly every 600 to 700 miles in steady-state driving. Sometimes it happens 5x a day, sometimes 1x, sometimes not at all. I am concerned that it might be a bad or clogged injector. 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. However, this does not mean weaker and in fact, quite the opposite. Free shipping. Once confirmed, crack the bleeder valve and hand prime until fuel squirts out. Previously been to 3 other shops where it received . 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). Nothing. The problem, which is exclusive to the 6.6L LML Duramax V-8, is a faulty fuel filter restriction sensor. 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. Turned it to tune 4 and was driving around. 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. Did not fix the issue. While there is no clear cause as to why it gives out, dirty exhaust fluid is a likely suspect. Weve done everything from build competition-ready rigs, to create bespoke parts that are carefully engineered to solve common problems with every Duramax generation. October 9th Full Moon Astrology, Are there any brand of CP3s that I should stay away from? Start < /a > JavaScript is disabled behind the wheel with us, often! 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. Want to find out more details of known issues and fixes? Customer states that if he lets it sit for a while, it will start. By injecting diesel exhaust fluid (DEF), a mixture consisting of 32.5-percent urea and 67.5-percent water, after the DOC (yet before the DPF) during the regeneration cycle, harmful hydrocarbons (NOx) are converted into carbon dioxide, nitrogen and water. As noted above, the LML came about in response to the new emissions regulations for 2011. 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). For a better experience, please enable JavaScript in your browser before proceeding. 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. 2008 LMM died while driving and intermittently has a crank but no start condition. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! 2007 classic 6.6. San Luis Obispo, CA 93401. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Now, i have rough idle intermittent. 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. There are two of them? How much pressure should it be making? I have a 2002 2500 duramax, The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. I pull a big LQ Horse trailer. 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. 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. 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. Any ideas? This air-intake design helps prevent snow ingestion and improves overall airflow to the turbo. 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. PO26c. hours of continuous driving on the road. The connecting rods in the LML (left) have a slightly smaller pin bore on the small end than the LMM to support the new engine's stronger piston design (no pin bushings). Since then rather than rev the engine and stop pulling, it . Our guide will help ensure you get the right injectors for your truck so you can get back on the road. 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. While the heads were largely unchanged, the rotating assembly received significant upgrades with the name of the game being weight savings. Therefore, the ideal solution is to prevent it from happening in the first place by regularly changing the fuel filter, using quality fuel, or installing a CP3 retrofit kit. The LML also marked the introduction of a new Bosch CP4.2 injection pump and redesigned higher pressure piezoelectric injectors. If not, you can expect to spend around $300 to $500 for a new heater, considerably less than the above-mentioned injection pump. Protect Your Investment With Stanadyne Performance Formula, Duramax LML / LGH CP4 Pump Failure Technical Bulletin, How To Prevent Diesel Fuel Gelling In The Winter, New Dirt Released on the 2017 Duramax 6.6L L5P V-8 Turbo Diesel Engine. Customer states that if he lets it sit for a while, it will start. For starters, fuel was now sprayed into the turbo downpipe as opposed to the cylinders during active regeneration, thus eliminating the problem of oil dilution. 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. Tried pumping the primer at the fuel filter. Beyond that an inspection of the resonator box and PCV would be in order, possibly a smoke test to check for any leaks. Driving Line Accelerating Automotive Passion by providing a fresh angle of what fuels us. Just a miss as idling. In the shop for the third time today. Is so fancy, use it to check and see if you 're making any pressure. I have 2014 duramax will bad thermostats affect the emission system ? After installing reprime system and start and run. 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). Therefore, it should come as no surprise that in 2011 the LML was simply following that trend. Unfortunately, it often does so rather suddenly and without warning. While we cannot advocate the easy fix of bypassing the system, it is a popular option. Whats the easiest way to diagnose a cp4 that shit the bed? Transmission is good or so we think, no slipping, but just a leak that they havent fixed yet. The LML also marked the introduction of a new Bosch CP4.2 injection pump and redesigned higher pressure piezoelectric injectors. 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. 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. Enjoy the site and read read read! If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. Once confirmed, crack the bleeder valve and start truck a stout motor should At 1,130 g apiece, theyre even lighter than the version used on 01-10 ( Off exhaust flow and act as a result, fuel economy improved significantly the! People often ask what is the best lift pump for an LBZ, and truthfully ANY lift pump is better than none at all. 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