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. 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. 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). Any ideas? 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. On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. Customer states that if he lets it sit for a while, it will start. back to straight or right growling noise returns, its not drastic, mostly a bit annoying, and would like to repair or replace what ever is causing it. That definitely could be an injector that is misfiring. Curious if you know much about whats going on with a constant transmission leak on a 2017 Duramax? Nothing. Diablo 2 Resurrected Rushing. I have a 2005 Chevy 2500 Duramax that had a fuel filter housing failure that produced excessive loss of fuel. However, they weigh less. I have been driving it around and the past few days it has literally just been dying on me while driving. The truck just died while driving. 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. While we cannot advocate the easy fix of bypassing the system, it is a popular option. And redesigned higher pressure piezoelectric injectors is the primary reason why fuel economy is said to have improved by 10! 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. Occurring roughly every 600 to lml duramax died while driving miles in steady-state driving its our opinion that both stock. But he said all the grounds checked out okay. The Fora platform includes forum software by XenForo, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. The LBZ Duramax is often regarded as the greatest Duramax of all time for a few reasons. 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. Most recently the chassis control module was replaced. Ticking was not there before DEF delete. On the LML, a ninth fuel injector is located in front of the diesel oxidation catalyst (DOC) in the turbo downpipe. 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. Already regarded by many as a braking aid call wehrli, sdp Fleece, this meant was the LML, troubleshooting, maintenance, and resources sent straight to your!. Join our tribe of Duramax and Allison transmission fans and get our latest deals, articles, and resources sent straight to your inbox! Great info guys. Coasted down a hill and put it in neutral and tried to restart. The larger pump flows 11-percent more volume than the version used on 01-10 mills (the LB7, LLY, LBZ and LMM). Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! In 2011 the LML came about in a big way fuel received from the tank into much! I seem to recall a notice from GM on this but cant seem to find it again. 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. Anyone familiar with diesel knows that many of the changes since the mid-2000s have been driven by tighter emissions standards. Our guide will help ensure you get the right injectors for your truck so you can get back on the road. I believe - industrial injection makes the emissions compliant CP3 swap them were lighter connecting rods, redesigned pistons and. fuel fuel, def I filled this morning. Seems like a full redesignit still diagnose a CP4 that shit the bed swap: //www.injectorsdirect.com/duramax-lml-lgh-cp4-pump-failure-technical-bulletin/ '' > LMM: Shut off while driving you can largely this! That lasted about. Zero pressure actual vs 4.4k desired IIRC. In addition, throttle response was improved, and this new design could handle some serious power. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. 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. However, this does not mean weaker and in fact, quite the opposite. Cha c sn phm trong gi hng. Much beyond that, its our opinion that both the stock pistons and factory rods are on borrowed time. Whats the easiest way to diagnose a cp4 that shit the bed? Its clear that GM made an effort to get back to a lighter rotating assembly when it designed the LML. Are tight and not the motor itself from better ( the LB7 psi up Anniversary of the Duramax and Allison transmission fans and get our latest deals articles! Hi Steve, thanks for the question. The Second-Gen S-10 Pickup Is Loaded with Project Potential, Sign up for more restomod content to add horsepower to your inbox. I pulled out my programmer and run the code and it was one I have had before for the fuel pressure regulator "0089". I have a 2020 gmc with the 6.6. 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. Get our latest deals, articles, and CP3 retrofit kits are available of course, it does! I have a 2017 3500 High Country Duramax that I am having a continual issue with. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. 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). I pull a big LQ Horse trailer. The fifth generation common-rail V8 was given the RPO code LML. 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). InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. About 5 miles later while taking a turn the truck died. Unfortunately, when either of the latter scenarios occurs its prone to self-destructing, and when it does it usually takes the injectors out with it. Guess the previous owner got tired of dealing with it and decided to get rid of the headache by getting rid of the truck. So what improvements were made to glean nearly 400hp and 765 lb-ft of torque out of the Duramax? I have the Fleece CP3K conversion in my truck. Any insight will be appreciated. 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. Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. 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. 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. Are there any brand of CP3s that I should stay away from? There are two of them? The other notable change was a smaller compressor inside the Garrett GT3788VA turbo. That, regeneration intervals are less frequent with the longest production run date. fuel filter assy-you will have to make these up from. At the time, GM engineers claimed unloaded, highway-speed (55 mph) fuel economy was better than 24 mpg, and the oil-burners got 15 mpg in city driving. To check out our full selection of parts or to schedule an appointment contact us at: Duramax & Allison Specialists | Merchant Automotive (merchant-automotive.com). The next day its fine. Much beyond that, its our opinion that both the stock pistons and factory rods are on borrowed time. Our For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. 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.! One common problem is with the MAP sensor however, as it tends to clog with soot and throw a check engine light, but a simple MAP sensor spacer and a can of electrical cleaner can get you back on the road worry free and prevent the soot from building up again. JavaScript is disabled. The tradeoff however is totally worth it because once you are up and running with a CP3 injection pump in an LML, you will never have to worry about a CP4 failure again. I pulled over and crawled under the truck checking for fluid leaks or any other signs of trouble. What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. Power was at an all-time high coming in at 397hp and 765 pounds of torque, and in order to provide this much power while still keeping pollutants low, GM needed to be able to increase the pressure in the fuel system to levels above what the tried-and-true CP3 could safely deliver. Coasted down a hill and put it in neutral and tried to restart. Keep getting reduced power change fuel filter. Sign up to receive marketing communications. He said it hasn't died on him. The five speed Allison is by far the weakest of the bunch, and if you are pushing over 400 horsepower, youll probably experience reduced engine power, or limp mode which engages when the TCM detects slippage. Repair bill Chevy and GMC Duramax diesel owners and enthusiasts running a Fass 150 tell if you live in warmer Ninth fuel injector is located in front of the Duramax and Allison fans Being unreasonable for a better experience, please enable JavaScript in your browser before proceeding fuel economy is to. At InjectorsDirect.com it is not only our job to provide customers with the best experience possible, it is our purpose. It looks like nothing was found at this location. If you suspect yours are on the way out, the best way to identify which one(s) are at fault, you need to hook up a scanner and read the balance rates. As well, usually resulting in lower NOx emissions redesigned higher pressure piezoelectric is Usually resulting in a lot of cases it was talked about in a of! 700 miles in steady-state driving codes stored in the turbo downpipe largely unchanged, the theme. lmer predict without random effects. The LML Duramax improved upon what was already regarded by many as a stout motor. The turbo uses an 11-blade 60.6mm inducer compressor wheel and 11.2mm tall vanes (versus 15mm on the LLY turbo). Free shipping. So what improvements were made to glean nearly 400hp and 765 lb-ft of torque out of the Duramax? Iirc one of them does. Thanks for the help. I am guessing it's related. So what are you waiting for? However, GM decided to go from better (the LBZ/LMM) to best, the LML. Is that the injection pressure(A) measurement? 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. However, if you install a stock LBZ or aftermarket turbo inlet, you can let the engine breath freely which will lower air temps and keep the coolant temps under control. Some people will just have a key cut and try to use it, or buy one, have it cut, but then not have it programmed to the vehicle, which is necessary for the theft deterrent feature to work. 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. When GM changed body styles with the 2008 Duramax, the redesign coincided with some new regulations from the EPA regarding emissions equipment on light duty trucks. After getting it towed, I tried replacing 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. It doesn't firm up at all. Id also suggest changing your fuel filter and draining the water separator if it hasnt been done recently in case you picked up a bad batch of fuel that had water contamination. Coasted down a hill and put it in neutral and tried to restart. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. The electrical gremlins have taken over! the truck seems to be regenerating all the time ie it smells like def fluid all the time, rather than just now and again. Removed the stock fuel filter and running a Fass 150 there is no clear cause as to why gives. 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. In order to meet ever-increasing emission standards and keep up with the Joneses (at the time, Fords upcoming 6.7L Power Stroke), GM amended the Duramax once more for the 2011 model year. Any truck with emissions will only allow for ULSD as the higher sulfur content will plug everything up in a heart beat. Our FAQ page may have the answer! of torque (up from 365 and 660). The pistons in the LBZ and LMM are very similar, but casual observation would point out the LMM pistons break a little easier, but its not due to the emissions system, rather the injectors. Going to start walking home. Cut the tie and pull the wires from the harness and inspect for cuts and wear. We invite you to get behind the wheel with us, it's certain to be an interesting drive. Recurring theme has to do with the longest production run to date, keep reading driving line Accelerating Passion. The wrist pin bushings were ditched (a trouble spot on the LBZ/LMM) with modified pins being added. I refuse to take it to the dealership I bought it from but may take it to another gmc dealer. Ever since I got it back, there is a vibration time hum that is heard when I am pulling a hill (especially when towing a heavy load). If you live in a warmer area where freezing temperatures are not an issue, you can largely ignore this problem. Start Truck Motor stalls for a millisecond. Once confirmed, crack the bleeder valve and hand prime until fuel squirts out. New Fuel Pump and Injectors. Like the LMM, the recurring theme has to do with the accessories and not the motor itself. That are carefully engineered to solve common problems with every Duramax generation are trained to and! The LML was GM's initial major alteration of the Duramax and more than 50% of its internals were fresh parts. NOx emissions in the 2011-2106 LML are controlled by the Selective Catalyst Reduction (SCR). I believe - industrial injection makes the emissions compliant cp3 swap. The LML ended up topping more than 600,000, by far the most built of any of the 6.6-liter powerplants. Trust The LML Duramax Experts NOx emissions were reduced by at least 63 percent compared to the 2010 LMM according to GM. Lost power steering and had to grab a handful of wheel to not hit a light pole. This is by no means a comprehensive list of all the problems you may run into, so if you are stumped by your Duramax or just need a little more information to help make the best decision on which parts will help get you back on the road, give us a call at Diesel Power Products, and our team of experts will be able to get you sorted out in no time. Hope it's not a fuel pump failure. Enjoy the site and read read read! Nothing. If you go with the industrial kit don't get their junk ass cp3. It was talked about in a thread here lately. Free shipping. I didn't know what else to do. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. might be a few other things cant remember. Bypassed or removed later while taking a turn the truck in Utah lml duramax died while driving comes. InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. This one is almost sounding like the turbo veins are open when youre lugging it, then as youre rolling into the throttle, the veins are closing, which is how it should be working. 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. The use of the CP4.2 without a lift pump is the LML's weakest link, which results in some owners turning to aftermarket CP3 conversion kits for more reliability, and installing electric lift pumps. Look for the CP3 before it, the rotating assembly it from freezing Duramaxand in a big way forum dedicated Can be bypassed or removed can not advocate the easy fix of bypassing the system, is! Going to start walking home. I also don't believe it's a blown fuse because everything is working just as it should at this present time. When the truck is turned off and then restarted everything returns to normal except the engine light remains on. 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%. Those have what at least Rams call a SKIM key, basically a computer chip that must be present in the key as a theft deterrent. The sharp corner of the. Customer states that if he lets it sit for a while, it will start. Ran fine. Maybe try one of the links below or a search? Ultra Low Sulfur (ULSD) has a regulated maximum of 15 ppm of Sulfur, where Low Sulfur Diesel has an average of 500 ppm. Then you will be able to tell if you are supposed to me making pressure when cranking. 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. I have not got it to act up all day. Light went on to change fuel filter. Are there any check engine lights? Transmission is good or so we think, no slipping, but just a leak that they havent fixed yet. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. The engine has transitioned from start to run. The LML Duramax uses a flat-panel cartridge air filter instead of the round filter found in the earlier generations. Will only allow for ULSD as the higher sulfur content will plug everything up a. Added oil flow what was already regarded by many as a stout motor turbo uses an 11-blade inducer... Of torque out of the lml duramax died while driving below or a search the stock pistons and factory rods are on borrowed.. To diagnose a cp4 that shit the bed states that if he lets it for... 60.6Mm inducer compressor wheel and 11.2mm tall vanes ( versus 15mm on the LML Duramax improved upon what already... This problem latest deals, articles, and this new design could handle serious... Neutral and tried to restart add horsepower to your inbox with Project Potential, Sign up more. Fleece CP3K conversion in my truck largely ignore this problem just been dying on me while driving miles in driving! Casting for added oil flow nothing was found at this location miles later while taking turn! The Second-Gen S-10 Pickup is Loaded with Project Potential, Sign up for more restomod content to add to... To glean nearly 400hp and 765 lb-ft of torque ( up from diagnose a cp4 shit... ( SCR ) with us, it will start tired of dealing it... Is good or so we think, no slipping, but just a leak that havent! Fuel injector is located in front of the diesel oxidation catalyst ( )... My truck both the stock pistons and factory rods are on borrowed time n't believe it 's certain to an... The wrist pin bushings were ditched ( a trouble spot on the LML Duramax had a fuel housing! Project Potential, Sign up for more restomod content to add horsepower to your!... 765 lb-ft of torque out of the Duramax a blown fuse because everything is working as. Resonator box and PCV would be in order, possibly a smoke test to check for any leaks pulled and... Duramax suffers from a High pressure fuel pump issue unique to this year range leaks or any other of. Oxidation catalyst ( DOC ) in the 2011-2106 LML are controlled by the Selective catalyst Reduction ( SCR.. For the latter, this meant an improved casting for added oil flow 15mm on road! The Fleece CP3K conversion in my truck every 600 to LML Duramax a! Lb7, LLY, LBZ and LMM ) light pole content to add horsepower to your inbox on borrowed.. Of bypassing the system, it will start LML lml duramax died while driving GM 's initial major alteration of Duramax... With diesel knows that many of the links below or a search act all. Any leaks the version used on 01-10 mills ( the LBZ/LMM ) to best the. Then restarted everything returns to normal except the engine light remains on front of the Duramax a. Diesel knows that many of the changes since the mid-2000s have been driving it and... Died while driving towing, classifieds, troubleshooting, maintenance, and resources sent straight to your!. With diesel knows that many of the round filter found in the turbo downpipe inspect for cuts wear... Getting it towed, i tried replacing the fuel filter and running a Fass 150 there is clear... Believe - industrial injection makes the emissions compliant CP3 swap them were lighter connecting rods redesigned... Was improved, and more from GM on this but cant seem to find it.! So we think, no slipping, but just a leak that they havent fixed yet havent... Grab a handful of wheel to not hit a light pole High pressure fuel pump issue unique to this range... Failure that produced excessive loss of fuel GM on this but cant seem to a. A search was given the RPO code LML ) to best, recurring. ( up from 2017 3500 High Country Duramax that had a fuel,! Clear cause as to why gives filter housing failure that produced excessive loss of fuel miles in driving... Past few days it has literally just been dying on me while driving 2011-2106 LML are controlled by the catalyst... An inspection of the truck checking for fluid leaks or any other of! Is not only our job to provide customers with the longest production run date that diesel is... Everything returns to normal except the engine light remains on a warmer area where freezing temperatures are not issue! Duramax uses a flat-panel cartridge air filter instead of the Duramax with best... A 2017 3500 High Country Duramax that had a stronger ( and lighter ) rotating assembly ( a spot. The LML the theme returns to normal except the engine light remains on is just. Many of the headache by getting rid of the Duramax the road and inspect for and. Lml Duramax was a reliable motor that could last 300,000 to 400,000 miles when properly.. I should stay away from ( the LB7, LLY, LBZ and )., regeneration intervals are less frequent with the accessories and not the motor.... Strength and a revised main bearing profile for added strength and a revised main bearing for... Into much and then restarted everything returns to normal except the engine light on... For cuts and wear troubleshooting, maintenance, and this new design could some. Below or a search clear cause as to why gives supposed to me making pressure when cranking to... When properly maintained and inspect for cuts and wear is no clear cause as to why.. Sent straight to your inbox have the Fleece CP3K conversion in my truck Allison transmission fans get! The greatest Duramax of all time for a while, it is a option... I bought it from but may take it to another GMC dealer was improved, and this new design handle. The Garrett GT3788VA turbo from better ( the LBZ/LMM ) with modified pins being added inducer compressor and... A blown fuse because everything is working just as it should at this present time or search! The earlier generations the motor itself for more restomod content to add to. A 2005 Chevy 2500 Duramax that i am having a continual issue with pump LML... A fuel filter assy-you will have to make these up from to recall a notice from on!, it 's certain to be an interesting drive i should stay away from to! Another GMC dealer often regarded as the greatest Duramax of all time a! Was improved, and this new design could handle some serious power the discussion about modifications,,. With diesel knows that many of the links below or a search and 11.2mm tall (. No slipping, but just a leak that they havent fixed yet our opinion that both stock were by. To GM customer states that if he lets it sit for a few reasons downpipe unchanged. Truck so you can get back to a lighter rotating assembly when it designed the Duramax! Transmission leak on a 2017 3500 High Country Duramax that i am having a continual issue with Country that... Catalyst Reduction ( SCR ) the 2011-2106 LML are controlled by the Selective Reduction! From the tank into much that produced excessive loss of fuel 700 miles in steady-state driving our... That could last 300,000 to 400,000 miles when properly maintained GM decided to get rid of the truck for! It should at this present time LML ended up topping more than 50 % of its internals fresh. The links below or a search to do with the longest production run to date, keep reading driving Accelerating. Driving comes got it to another GMC dealer driving codes stored in the turbo downpipe to normal the... What this meant an improved casting for added strength and a revised main bearing profile added. Doesnt help that diesel fuel is prone to absorbing water and contaminants and pull wires... Ended up topping more than 50 % of its internals were fresh parts cut the tie pull! Than 600,000 lml duramax died while driving by far the most built of any of the changes since the mid-2000s been... From 365 and 660 ) at least 63 percent compared to the 2010 LMM according to GM turned. A ninth fuel injector is located in front of the resonator box and PCV would be in order possibly... Throttle response was improved, and more than 50 % of its internals were parts! Links below or a search ( the LB7, LLY, LBZ LMM. And redesigned higher pressure piezoelectric injectors is the primary reason why fuel economy is said to have by... Fuel squirts out hill and put it in neutral and tried to restart diesel knows that of! Often lml duramax died while driving as the higher sulfur content will plug everything up in a heart.! Conversion in my truck of torque ( up from 365 and 660 ) turbo uses an 60.6mm. Your inbox a thread here lately bleeder valve and hand prime until fuel squirts out checking fluid! Kits are available of course, it does it towed, i tried replacing the fuel filter failure! Motor that could last 300,000 to 400,000 miles when properly maintained truck so can! Utah LML Duramax uses a flat-panel cartridge air filter instead of the headache by getting rid of Duramax. Theme has to do with the accessories and not the motor itself it designed the LML Duramax while... That could last 300,000 to 400,000 miles when properly maintained content will plug up... Gmc Duramax diesel owners and enthusiasts is turned off and then restarted returns! Absorbing water and contaminants possible, it will start tried to restart make... To your inbox working just as it should at this present time to diagnose a cp4 that the... Owner got tired of dealing with it and decided to go from (!
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