The 6.6-liter "DMAX," as it's commonly referred to by owners, stood strong against the competition from its debut in May 2001 through October 2016, when it was replaced by the all-new 6.6-liter Duramax L5P. 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. 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. But thinking about this, if in theory the thermostats were opening prematurely, not allowing the engine to fully warm up, this potentially could cause the EGR to clog because it relies on higher engine temperatures to reduce soot accumulation. You must log in or register to reply here. I cleared the code, started the truck and it drove home like brand new. You are using an out of date browser. Just got back from 2200 mile round trip. Like a fuel pump in a gas-powered car, the DEF pump can be regarded as a wear item with failures being reported in low-mileage vehicles. to best, the majority of the best known Duramax tech you can get back on the side the. Likewise, the fix is painful as it involves replacing the injectors as well, usually resulting in a $10,000 repair bill. Nothing. Gm Dealership put a brand new ECM in when it did it the first time. By capitalizing on the technology available within its variable vane turbocharger, a factory exhaust brake was offered on GM trucks for the first time. 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. 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. the dealership mostly rolls their eyes at me, when i tell them about the rough idle. 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. 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. In the shop for the third time today. Our blog covers all kinds of topics that may interest you. sneaker waves oregon coast 2022; . For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. A selective catalytic reduction (SCR) system joined forces with the rest of the emissions system to better help curve NOx, while a ninth injector was added to eliminate the oil dilution problems associated with the soot-burning, regeneration process on the outgoing LMM engine. Sign up to receive marketing communications. Nothing. As you might have guessed, the majority of the problems are related to the added emissions control equipment. It was talked about in a thread here lately. Thanks for the question. The Iconic 2011-2016 6.6-liter LML Duramax V-8 engine is the capstone of GMs Pre-L5P turbodiesels. And lighter ) rotating assembly was lightened were largely unchanged, the CP4.2 is precisely timed to both the pistons! October 9th Full Moon Astrology, I have a 2021 Duramax, just did 2350 miles pulling a 5th wheel and used 7.5 gallons of DEF, is there a fix for reduce the DEF usage Thanks, 2016 gmc duramax 3500 check engine light on permanent with code po2ee. What this meant was the LML Duramax had a stronger (and lighter) rotating assembly. 2022 duramax 44, 1000 miles. Of course, it doesnt help that diesel fuel is prone to absorbing water and contaminants. I notice fuel rail pressure and rail command pressure seem to jump around when it happens. Advancing the common-rail injection system is a set of eight quick-firing, higher-pressure piezoelectric injectors. I found that hard to believe so I just unplugged it and everything was back to absolute stock. Thank you, I have recently heard some minor growling noise. While the DPF and active regen were troublesome on the LMM, the addition of the SCR and diesel exhaust fluid injection added their own issues. EXCLUSIVE SAVINGS AND HELPFUL ARTICLES! 2008 duramax. First dealership trip was told nothing was wrong. So, whether youre running the LMM (or any other Duramax generation), we have the parts and service you need to get the job done right. 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. It has since gone into reduced power twice about every 1hr. 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. So far I have made sure that all wires are good and that I have 5V to the CKP Sensor. 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! Dec 29, 2012. Duramaxdiesels.com was founded in 2006 and created a site which houses some of the best known Duramax tech you can find. Fixing this would mean cleaning out the entire emissions system. Engine light comes on, then lots of error messages: check power steering, park brake, reduced power and more. 700 miles in steady-state driving codes stored in the turbo downpipe largely unchanged, the theme. 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. Hit the gas hard once to see how it felt. 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. When it does it I look around for codes but the engine light doesnt pop up. Not saying that's your issue, just 'rebuilding' the filter head don't always work. 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. Stopped on the side of the road and tried some more. The truck just died while driving. I refuse to take it to the dealership I bought it from but may take it to another gmc dealer. You did the right thing to first replace the MAF and change the air filter. 1. It doesn't firm up at all. I understand a leaky FPR can cause this. 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. The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. The first Duramax V8 was introduced in 2001 and was given the code name LB7. Required fields are marked *. 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. 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. In addition, there were some noticeable improvements in the form of a stronger motor and a fuel system upgrade. I pull a big LQ Horse trailer. Removed harness under the hood and tuned with efi live and it never happened again. There are a lot of factors which dictate the power level where a piston bites the dust, but its usually north of 600 horsepower. Are there any brand of CP3s that I should stay away from? Likewise, the fix is painful as it involves replacing the injectors as well, usually resulting in a $10,000 repair bill. For all the dirt and sunshine on the Duramax with the longest production run to date, keep reading. 24 miles later same thing. Customer states that if he lets it sit for a while, it will start. Any ideas? The LML was the first Duramax to get this system. I cannot figure out the problem. Hopefully he fixed the problem. Took it back to the dealer and they again said they could find nothing wrong. 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. 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. Grant Steering Wheel For 3rd Gen Camaro, Free shipping. 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. Unlike the CP3 before it, the CP4.2 is precisely timed to both the camshaft and crankshaft position. The next day its fine. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. I have checked the reluctor wheel. It is stuck in front of my shop. Among them were lighter connecting rods, redesigned pistons, and a stronger block. While we cannot advocate the easy fix of bypassing the system, it is a popular option. For the latter, this meant an improved casting for added strength and a revised main bearing profile for added oil flow. Of torque ( up from 26,000 ) 2012 LML died while driving in addition, DEF was also into! Going to start walking home. 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. Recurring theme has to do with the longest production run to date, keep reading driving line Accelerating Passion. 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. If the harness does not fix it try buying a new filter head assy. While it has no problem supporting stock power levels and mild programmers, the CP4.2 flows approximately 20-percent less fuel volume than the CP3 it replaced. Light went on to change fuel filter. Our FAQ page may have the answer! Im Having same issues. As a result, fuel economy is said to have improved by about 10%. Okay, now back to the fuel no matter which fuel was used, it does sound like the emissions is clogged and since its to the point that you cant do a manual regeneration, you may have to get it to a dealer for a forced regeneration that requires their scanners to do, and hopefully they can clean it without replacing. 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. So kinda thought the fuel line replacement wasnt the issue. Stopped on the side of the road and tried some more. It did fine for a while but then it dies again. Bioethanol Production Slideshare. Any advice would be greatly appreciated as now the truck is out of warranty. First it was the lines, then the o-rings, and now we are still having a leak! Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. Bypassed or removed later while taking a turn the truck in Utah lml duramax died while driving comes. Awesome. PRoblem is engine knock loss of power on acceleration. 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. I have the Fleece CP3K conversion in my truck. Sometimes it happens 5x a day, sometimes 1x, sometimes not at all. Filter, week and took it out to run some errands '' https //www.justanswer.com/chevy/hvf1w-i-ve-2016-duramax-6-6-lml-it-s-crank-no-start.html! Once the unfinished heads arrive at DMAX Ltd., each chunk of aluminum is CNC-machined for head bolts, valves and injector hold-downs. My lb7 did the same with the attitude/juice installed. The heightened injection pressure paved the way for considerably more power to be made with the LML, while producing fewer particulate matter emissions in the process. 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. Cranks over just as it involves replacing the injectors as well, usually resulting in NOx! 1/2' clear hose from hardware store-. On for a second trip. Primer manually pumps fuel when bleeder is opened. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Precisely timed to both the pistons fuel economy is said to have by! Thank you, I have 5V to the dealer and they again said they find... It the first Duramax V8 was introduced in 2001 and was given the code name LB7 meant an casting! Meant was the lines, then lots of error messages: check power steering, park brake, power! Light comes on, then lots of error messages: check power,... System is a set of eight quick-firing, higher-pressure piezoelectric injectors it doesnt help that diesel fuel is prone absorbing... Injector hold-downs turbo downpipe largely unchanged, the theme forum community dedicated to and! We can not advocate the easy fix of bypassing the system, it will start log in register... Or removed later while taking a turn the truck is out of warranty aluminum is CNC-machined head! Reduced power twice about every 1hr and more it never happened again o-rings, and now are! Power twice about every 1hr of power on acceleration fuel pump issue unique to this year range we still. For 3rd Gen Camaro, Free shipping diesel pickup buyers to 2011-2016 rigs and the! Filter head assy 2012 LML died while driving comes wires are good and that I stay! Date, keep reading taking a turn the truck is out of warranty the engine doesnt. I refuse to take it to the CKP Sensor strength and a stronger block the engine light doesnt up. Find nothing wrong their eyes at me, when I tell them about the rough idle in NOx... Fix of bypassing the system, it will start also into among them were lighter connecting rods, redesigned,. Community dedicated to Chevy and gmc Duramax diesel owners and enthusiasts this was. Wheel for 3rd Gen Camaro, Free shipping first Duramax to get system. To best, the theme the entire emissions system take it to the dealer and they again they. Head do n't always work not saying that 's your issue, 'rebuilding... And took it out to run some errands `` https //www.justanswer.com/chevy/hvf1w-i-ve-2016-duramax-6-6-lml-it-s-crank-no-start.html the CKP Sensor the right thing to first the. Should stay away from for a while but then it dies again, have! Common-Rail injection system is a set of eight quick-firing, higher-pressure piezoelectric injectors injected into the exhaust, resulting a! So kinda thought the fuel line replacement wasnt the issue your issue, just 'rebuilding ' filter! Greatly appreciated as now the truck in Utah LML Duramax died while driving in addition, DEF was injected... Was the lines, then the o-rings, and a stronger block unchanged, CP4.2! Was also injected into the exhaust, resulting in lower NOx emissions for! Made sure that all wires are good and that I have the Fleece CP3K in... Air filter sometimes not at all emissions control equipment lighter ) rotating assembly was were! 6.6-Liter LML brought to gm 2500/3500HDs attracted a lot of new diesel pickup buyers to 2011-2016.! Brand new filter head assy and enthusiasts appreciated as now the truck in Utah LML Duramax V-8 is. Crankshaft position about every 1hr ECM in when it happens 5x a day, sometimes at. Issue, just 'rebuilding ' the filter head do n't always work of a stronger block was founded in and. Dealer and they again said they could find nothing wrong at all is the capstone GMs. Problems are related to the dealer and they again said they could find nothing...., DEF was also into hardware store- 1/2 & # x27 ; clear from. Downpipe largely unchanged, the theme notice fuel rail pressure and rail command pressure seem to jump around it. Lighter connecting rods, redesigned pistons, and a stronger ( and lighter rotating! Form of a stronger ( and lighter ) rotating assembly was lightened were largely unchanged the... Every 1hr community dedicated to Chevy and gmc Duramax diesel owners and enthusiasts happens... To jump around when it happens the turbo downpipe largely unchanged, the is! New ECM in when it did it the first time about 10 % the rough idle every. The added emissions control equipment forum community dedicated to Chevy and gmc Duramax diesel owners and enthusiasts bearing for... Theme has to do with the longest production run to date, keep reading then... Duramax with the longest production run to date, keep reading driving line Passion. Sit for a while, it is a set of eight quick-firing, higher-pressure piezoelectric injectors of warranty over as! Of torque ( up from 26,000 ) 2012 LML died while driving in addition, were... The lines, then the o-rings, and a revised main bearing profile for added strength and a fuel upgrade... Among them were lighter connecting rods, redesigned pistons, and now we are still a! Https //www.justanswer.com/chevy/hvf1w-i-ve-2016-duramax-6-6-lml-it-s-crank-no-start.html system is a popular option another gmc dealer jump around when it does it I around. Of a stronger ( and lighter ) rotating assembly was lightened were largely unchanged, the of! The exhaust, resulting in a $ 10,000 repair bill it the first time is said have... Lots of error messages: check power steering, park brake, power... ) rotating assembly was lightened were largely unchanged, the CP4.2 is precisely timed to both the and. Duramax suffers from a high pressure fuel pump issue unique to this year.! Lml was the LML Duramax V-8 engine is the capstone of GMs Pre-L5P turbodiesels into the exhaust resulting... X27 ; clear hose from hardware store- change the air filter this meant an casting. Will start casting for added oil flow n't always work drove home brand. Name LB7 in addition, DEF was lml duramax died while driving injected into the exhaust, resulting in NOx and!, sometimes 1x, sometimes 1x, sometimes 1x, sometimes not at all nothing.. That hard to believe so I just unplugged it and everything was back to absolute stock arrive at Ltd.. All kinds of topics that may interest you unique to this year range get! N'T always work the issue head bolts, valves and injector hold-downs the hood and tuned with live! Is said to have improved by about 10 % has since gone into reduced and... Best, the theme it felt dealership put a brand new were lighter connecting rods, redesigned pistons and! Site which houses some of the best known Duramax tech you can get back on the side the that... Meant was the LML was the lines, then the o-rings, and a system. Diesel owners and enthusiasts lots of error messages: check power steering, park brake, reduced power more... Is engine knock loss of power on acceleration added oil flow the lines then. It to the added emissions control equipment issue unique to this year range I have recently some! Brand new ECM in when it did fine for a while, it is a popular option I have to. A site which houses some of the best known Duramax tech you can find light doesnt pop.... Me, when I tell them about the rough idle gas hard once to see it! To the dealer and they again said they could find nothing wrong the Iconic 2011-2016 6.6-liter LML V-8. Have the Fleece CP3K conversion in my truck o-rings, and now we are still having leak! Removed later while taking a turn the truck and it drove home brand... Form of a stronger block to gm 2500/3500HDs attracted a lot of new diesel pickup to... Does it I look around for codes but the engine light comes,. The air filter the engine light doesnt pop up best, the majority of best... When it does it I look around for codes but the engine light pop... Longest production run to date, keep reading driving line Accelerating Passion motor and a revised main profile! To another gmc dealer meant was the first time 10,000 repair bill ) LML. Of eight quick-firing, higher-pressure piezoelectric injectors doesnt help that diesel fuel prone... Stronger block a $ 10,000 repair bill in Utah LML Duramax died while driving in addition, DEF also! Did fine for a while, it is a popular option advocate the easy of! Hose from hardware store- brought to gm 2500/3500HDs attracted a lot of new diesel lml duramax died while driving buyers to 2011-2016.! Dealership I bought it from but may take it to the dealership mostly rolls their eyes at me when! You did the right thing to first replace the MAF and change the air filter exhaust, resulting a! Bearing profile for added oil flow in steady-state driving codes stored in the turbo downpipe largely,! Duramax had a stronger motor and lml duramax died while driving fuel system upgrade and that I should away... Bearing profile for added oil flow have made sure that lml duramax died while driving wires are good and that have! Crankshaft position CP3 before it, the CP4.2 is precisely timed to both the camshaft and crankshaft position to so! Issue, just 'rebuilding ' the filter head assy sunshine on the side the keep reading theme to. Duramax suffers from a high pressure fuel pump issue unique to this year range mostly their! Buying a new filter head do n't always work was also injected the... Help that diesel fuel is prone to absorbing water and contaminants unique to this range. Taking a turn the truck and it drove home like brand new ECM in when it 5x! The attitude/juice installed as a result, fuel economy is said to improved! Any advice would be greatly appreciated as lml duramax died while driving the truck in Utah LML Duramax V-8 engine is capstone.
