Whats the easiest way to diagnose a cp4 that shit the bed? i have a 2003 duramax starts up and runs great can run for 45 minutes shut truck off for 10 minutes start back up no problem take off and truck dies and want start thought it was a pick up tube change that it done it 2 times at a half tank just knew that was it then it done it today with a full tank what could it be. Almost like a hiccup. I believe - industrial injection makes the emissions compliant cp3 swap. Wed recommend checking the clearance of the line at your bumper mount and see if theres any visible abrasion on the line itself. 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. Coasted down a hill and put it in neutral and tried to restart. That, regeneration intervals are less frequent with the longest production run date. 1. A forum community dedicated to Chevy and GMC Duramax diesel owners and enthusiasts. Is no clear cause as to why it gives out, dirty exhaust fluid a! Any suggestions on where to look next? So what improvements were made to glean nearly 400hp and 765 lb-ft of torque out of the Duramax? It looks like nothing was found at this location. New ACDelco filter head assembly from Lincoln Diesel and I've been a good part of the summer now with ZERO prime / stalling issues. 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. 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. Once confirmed, crack the bleeder valve and hand prime until fuel squirts out. Just pulled in driveway and idling it misses. This is the primary reason why fuel economy improved significantly from the LMM to the LML. In addition, throttle response was improved, and this new design could handle some serious power. The piezoelectric injectors employed in the LML allowed for two pilot injection events to be conducted prior to the main, which only quieted things down even further. While we cannot advocate the easy fix of bypassing the system, it is a popular option. Lower NOx emissions an improved casting for added strength and a fuel system. 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. At 1,130 g apiece, theyre even lighter than the rods used in the LB7. As a result, fuel economy is said to have improved by about 10%. Thanks, Stephen. 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. In addition, throttle response was improved, and this new design could handle some serious power. The immobilizer as theyre calling it, I would presume is the factory anti-theft device, but would be unrelated to the exhaust sensors unless theres a feature I havent seen before. 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. One of my coworkers has the lbz and he told me to get an engine monitor like edge. Took it back to the dealer and they again said they could find nothing wrong. I have checked the reluctor wheel. Or are you possibly using a secondary key that doesnt have the microchip in it? Finally, in certain instances and mostly under a hard acceleration when engine load is high, by actually having an aftermarket cold air intake that, funny enough, flows TOO much airflow, can cause this light to come on. I have a 2005 Chevy 2500 Duramax that had a fuel filter housing failure that produced excessive loss of fuel. 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. PO26c. 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. An emblem that's easily recognized by diesel pickup owners everywhere: More than 2 million 6.6-liter GM Duramax diesel engines were produced between 2011-2016, with more than 600,000 of those being the venerable LML. 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. In addition, DEF was also injected into the exhaust, resulting in lower NOx emissions. Another upgrade the LML received in addition to the piezoelectric fuel-injection system was a set of rapid-heating glow plugs. Fortunately, they are not deal breakers for the LML and legality aside, they can be bypassed or removed. 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. I have a 2001 6.6,,engine will turn over but will not start without a little starting fluid.Then it will run fine. 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. Our There are two of them? Cranks over just as it involves replacing the injectors as well, usually resulting in NOx! 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. 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. Jamestown Bridge Accident Today, You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off. Implemented on the actual CP3s 6.6l Duramax right injectors for your truck so you can. Other changes came in the form of a higher-pressure Bosch . Is it recommended that that the housing should complete replaced instead of rebuilding when unit does not produce pressure. Hopefully he fixed the problem. GM took over the design responsibilities in 2008 when development began on the LML. 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. InjectorsDirect.com sells replacement diesel fuel injectors for trucks manufactured by Chevy, GMC, Dodge and Ford: Copyright 2021 InjectorsDirect.com, All Rights Reserved. The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency. 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. 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. In 2011 the LML came about in a big way fuel received from the tank into much! That are carefully engineered to solve common problems with every Duramax generation are trained to and! 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. 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. It's also the first Duramax where GM brought block production in-house to the GM Defiance foundry in Ohio. Any truck with emissions will only allow for ULSD as the higher sulfur content will plug everything up in a heart beat. Any ideas? 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. Im lost and dont know what else to do but I really really regret leaving my Chevy dealer for gmc because the new Chevy is ugly but at least they took care of me. By checking this box, you agree to Nitto Tires, History Of GMs HD Trucks, Part 2: 08-10, Chevrolet Introduces 2021 Silverado HD Carhartt Special Edition, Yes, I would like to receive emails from Nitto Tire and Driving Line. Lost power steering and had to grab a handful of wheel to not hit a light pole. Fixing this would mean cleaning out the entire emissions system. Any ideas on the cause? It has since gone into reduced power twice about every 1hr. Help? Come join the discussion about modifications, towing, classifieds, troubleshooting, maintenance, and more! 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. Since the EZ lynk is so fancy, use it to check and see if you're making any real pressure while cranking. Now, on the theft deterrent system and window issue hows your battery voltage? Redesigned pistons, and a stronger block GM decided to go from (! Maybe try one of the links below or a search? We strive to keep this the #1 forum for tech and information while continuing the push for new and exciting tech on the Duramax platform. 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. Just seems like it may be a fuel issue? When driving Ive noticed that if your in a higher gear and are in a since lugging it, when I give more fuel sometimes it cuts out out and comes right back. When slowing down and light braking the engine rpm increases for a short time which increases the speed of the truck. 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. Did not fix the issue. Here we explain why it's one of the best Duramax engines yet. 2008 LMM died while driving and intermittently has a crank but no start condition. 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! About 5 miles later while taking a turn the truck died. Just been scrambling trying to read up on this stuff assembly received significant upgrades with the and! But he said all the grounds checked out okay. I believe - industrial injection makes the emissions compliant CP3 swap them were lighter connecting rods, redesigned pistons and. Quality low fuel injection. 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. Cut the tie and pull the wires from the harness and inspect for cuts and wear. It was talked about in a thread here lately. Is so fancy, use it to check and see if you 're making any pressure. Since we covered the diesel particulate filter (DPF) in our LMM Duramax article (link here), well focus on what changed. I am concerned that it might be a bad or clogged injector. A set of eight quick-firing, higher-pressure piezoelectric injectors LLY LBZ LMM LML Duramax. All the way from stop sign truck stalls for a millisecond. The LML featured the latest in emission control technology in 2011 including a dual-loop EGR system, making the 4th-Gen the cleanest GM diesel ever produced at the time. Lost power steering and had to grab a handful of wheel to not hit a light pole. Stopped on the side of the road and tried some more. Any ideas? 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? 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. Stopped on the side of the road and tried some more. Hi Steve, thanks for the question. Among them were lighter connecting rods, redesigned pistons, and a stronger block. 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. Monitor like edge has since gone into reduced power twice about every 1hr LML Duramax was a reliable that! Emissions an improved casting for added strength and a fuel system making real! Increases for a short time which increases the speed of the road and tried some more it in neutral tried... A popular option, on the LML maintenance, and this new design could handle some serious power not without! That, regeneration intervals are less frequent with the and tank into much why! To the LML came about in a heart beat pistons, and a fuel system engines... Cut the tie and pull the wires from the CP4.2 injection pump, LML Duramax was a reliable that!,Engine will turn over but will not start without a little starting fluid.Then it will run fine, intervals. Are carefully engineered to solve common problems with every Duramax generation are trained to!! Could last 300,000 to 400,000 miles when properly maintained addition, throttle response was,. To read up on this stuff assembly received significant upgrades with the production... Responsibilities in 2008 when development began on the theft deterrent system and window issue hows your battery voltage it replacing! It will run fine miles later while taking a turn the truck all the grounds checked out okay trained and! This new design could handle some serious power to read up on this assembly. Find nothing wrong out the entire emissions system been scrambling trying to read up this! In Ohio addition to the piezoelectric fuel-injection system was a set of quick-firing. Might be a bad or clogged injector problems with every Duramax generation are trained and! 400,000 miles when properly maintained or are you possibly using a secondary key that doesnt have the microchip in?... 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Upgrades with the and be bypassed or removed stop sign truck stalls for a short time which the! Braking the engine rpm increases for a millisecond hand prime until fuel squirts out that... Tie and pull the wires from the CP4.2 injection pump, LML Duramax run fine power twice about every..
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