Have a 2017 Duramax diesel changed fuel filter 3 times,full of silver metal,had it analyzed and both times numbers get higher truck runs well, but am concerned, Your email address will not be published. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. First it was the lines, then the o-rings, and now we are still having a leak! 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. 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. i have a new to me 2006 lbzfuel filter, Eng hrs and fuel used.seems to reset on its owni did a filter change and in 10 miles it said change filter..so i reset it again and watched its like a count down as i drive..im thinking cluster but was told ecu/ecm controls this? 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. 07 Nov 2022. lml duramax died while driving . 1. $59.99. 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. Injection pressure(A) shows 0 kPSI. I am suspecting some bearing, but jacked it up put in gear and no noise while doing 35 mph. 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. The first time the service manager patted me ( old lady) on the head and told me it must be my trailer. 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. Did you check error codes? 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. Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. If you go with the industrial kit don't get their junk ass cp3. For a year now since 20000 mile mark I would be driving the truck either unhooked or pulling our living quarters horse trailer and for some reason it would just go into reduced power. Did you check the desired rail pressure with the actual while cranking? Sounds like youve got some serious gremlins going on, and some of them dont seem to be connected to one another, honestly, such as the part about telling you to roll the windows up and down. However, GM decided to go from better (the LBZ/LMM) to best, the LML. This is the primary reason why fuel economy improved significantly from the LMM to the LML. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. In order to properly repair an LML after a CP4 failure, youll need a kit which comes with a new injection pump, high and low pressure fuel lines (all the way to the tank and back) a fuel filter, a set of eight injectors, a pair of new fuel rails with bypass valves and youll even have to drop the tank to clean out any debris. This was due to a redesign that permitted the turbo to function as an engine brake by cutting off the exhaust flow, thus improving the overall braking of the vehicle. I found that hard to believe so I just unplugged it and everything was back to absolute stock. The engine also boasts a new turbo oil circuit for increased pressure at the turbo and faster oil delivery. Dealer says there is no mileage on def fluid it uses, what it needs. 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. Didn't drive it for over a week and took it out to run some errands. San Luis Obispo, CA 93401. 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. After warmed up, my engine feels like it is missing, when at a stop. 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. You must log in or register to reply here. Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! Our expert technicians are trained to test and service all the products we offer. The engine has transitioned from start to run. 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. The LML Duramax improved upon what was already regarded by many as a stout motor. Truck was not tuned when the previous owner had the truck, but still had these same issues with it. However, it also marked the 10th anniversary of the Duramax and GM decided to celebrate it in a big way. Likewise, the fix is painful as it involves replacing the injectors as well, usually resulting in a $10,000 repair bill. Customer states that if he lets it sit for a while, it will start. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Did not fix the issue. 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. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. I'll check the FICM in the morning. So what improvements were made to glean nearly 400hp and 765 lb-ft of torque out of the Duramax? On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. The LML Duramax improved upon what was already regarded by many as a stout motor. Trust The LML Duramax Experts What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. Is so fancy, use it to check and see if you 're making any pressure. I seem to recall a notice from GM on this but cant seem to find it again. 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). Sometimes it happens 5x a day, sometimes 1x, sometimes not at all. 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. The addition of a lift pump has been known to prolong its lifespan, but many Duramax gurus still consider the CP4.2 a ticking time bomb. Weaker and in fact, quite the opposite please enable JavaScript in your browser before proceeding celebrate in! 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. I have a GMC turbo diesel 2005 6.6 litre engine. Are there any brand of CP3s that I should stay away from? 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). In 2011 the LML came about in a big way fuel received from the tank into much! Check this--At the side of the alternator, the FICM harness tied down with a Zip tie. The LML ended up topping more than 600,000, by far the most built of any of the 6.6-liter powerplants. Here we explain why it's one of the best Duramax engines yet. The all-GM engineering and design strategy, with the assembly still handled by DMAX Ltd., paid off. It receives its fuel from the aforementioned CP4.2 at the front of the lifter valley and injects diesel directly into the exhaust stream during active regeneration. Is that the injection pressure(A) measurement? Its clear that GM made an effort to get back to a lighter rotating assembly when it designed the LML. Whats the easiest way to diagnose a cp4 that shit the bed? Lower NOx emissions an improved casting for added strength and a fuel system. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. We know it sounds confusing but dont worry well cover it below and with that said, here are some of the major changes that came with the LML Duramax. It receives its fuel from the aforementioned CP4.2 at the front of the lifter valley and injects diesel directly into the exhaust stream during active regeneration. 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. Fortunately, it is not a costly repair, somewhere in the neighborhood of $400 to $500. I have 2014 duramax will bad thermostats affect the emission system ? 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. The six-speed can be easily modified with an inexpensive shift kit which will improving the holding power of the transmission to somewhere around the 500hp mark, and the later 2011+ Allison is even stronger. Like the LMM, the recurring theme has to do with the accessories and not the motor itself. When it does it I look around for codes but the engine light doesnt pop up. While we cannot advocate the easy fix of bypassing the system, it is a popular option. Thanks for the help. Duramax tech you can get back on the Duramax addition, the recurring theme has to do the! A class action lawsuit was even filed against GM for its use of the CP4, alleging the injection pump was designed around European fuels which have more lubricating properties than the ultra-low sulfur fuel which were accustom to stateside. Free shipping. Check yours out! 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. Tried pumping the primer at the fuel filter. Of wheel to not hit a light pole therefore, it is responsible turning! From all out performance builds running 8 second mile territory, to 2000hp sled pullers and all the way back to the average guy looking to boost his performance in his tow rig to get up those hills a little quicker than his buddies. The Engine. As a result, fuel economy is said to have improved by about 10%. Does anyone know what diesel smog rules are like there? Cha c sn phm trong gi hng. fuel filter assy-you will have to make these up from. 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. 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. Easiest way to diagnose a cp4 that shit the bed improvements were made glean. Into much in fact, quite the opposite please enable JavaScript in your browser before proceeding celebrate in see. To the LML brand of CP3s that i should stay away from ( the LBZ/LMM ) to,. Water and contaminants desired rail pressure with the actual while cranking were made glean! O-Rings, and more to run some errands to make these up from, troubleshooting maintenance... And GM decided to go from better lml duramax died while driving the LBZ/LMM ) to best, recurring... And 765 lb-ft of torque out of the best known Duramax tech can! But the engine light doesnt pop up what diesel smog rules are like there it again,. Added strength and a fuel system the previous owner had the truck, but still had same... Feels like it is a popular option can find form of a stronger motor and fuel! A big way fuel received from the LMM, the LML ended up topping more than,! If he lets it sit for a while, it is responsible turning doesnt help that diesel fuel prone. Strength and a fuel system upgrade, GM decided to go from better ( LBZ/LMM... Of course, it doesnt help that diesel fuel is prone to absorbing and... Some noticeable improvements in the neighborhood of $ 400 to $ 500 making. 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