A few upgrades like better friction material, key hydraulic modifications, a good trans cooler, and multi-disc torque converter can make sure you wont encounter “limp mode” for a very long time. Luckily there are a few preventative measures you can take to ensure you don’t have to drop the $7,500+ to get your LML back on the road after a CP4 failure. I know there will be some teething problems with an all new engine. 1 Quote; Share this post.

Chevy And GMC Are In Big Trouble Over Diesel Engines.

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. For more information on how we collect and use this information, please review our Privacy Policy. The complaints are organized into groups with data published by vehicle, vehicle component, and specific problem. "CarComplaints.com" ®, "Autobeef", "What's Wrong With YOUR Car?" 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 we’re accustom to stateside. The worst complaints are problems. 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 won’t allow the LML Duramax to run. Just wish the emissions would stop messing with the diesel engines. Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running from 2001 to 2005, and the six-speed starting in 2006 and running until 2019. While it may not be the first place you think to look, the stock air intake system can actually contribute to a hotter running LLY. The six-speeds have a lot of mechanical similarities with the five-speed, but the few slight tweaks allow the trans to hold a bit more torque. Link to post Share on other sites. 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. The five speed Allison is by far the weakest of the bunch, and if you are pushing over 400 horsepower, you’ll probably experience reduced engine power, or limp mode which engages when the TCM detects slippage. Transmission Problems. It might seem counterproductive to back-date your LML with a pump that’s been used since 2001 in the LB7 Duramax, but the Bosch CP3 actually has a greater horsepower capacity than the CP4, albeit at a slightly lower pressure range. We use cookies to analyze & improve your experience, & to personalize content and ads. 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. Regardless of which version of the Duramax or Allison you are driving, if you have a heavy right foot and a bunch of modifications, chances are you’ll need to invest in an upgraded Allison so you can put your foot down with no fear. 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. 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. California consumers may exercise their CCPA rights here. Common Duramax Diesel Problems, Troubleshooting, and Solutions, The Basics of Towing With Your Diesel (plus, the basic parts you’ll need), Picking the Right Carli Suspension System, A Look at The Ram-Air Diff Cover by Banks, Ford Powerstroke 6.0 Lawsuit and Fix your 6.0L. While it has nothing to do with the engine, it’s worth mentioning some Allison transmission problems because it can be a very costly repair if you happen to damage your trans and need a full rebuild. CarComplaints.com ® is an online automotive complaint resource that uses graphs to show automotive defect patterns, based on complaint data submitted by visitors to the site. If you've had a problem, please help us out and report it. Drives: 2020 Chevy 3500HD 6.6 Duramax; Posted June 28, 2017. By installing a lift pump with extra filtration from FASS or Airdog you will extend the life of the injection pump and injectors by allowing only the purest fuel into the system, and by feeding a steady supply of low-pressure fuel into the injection pump, it can better focus on its main task of generating high-pressure fuel. BMW i3 Range Extender Lawsuit Certified in California, read stories from drivers who praise our work.

One problem can rear its head when you are pushing the power of the LMM to a level GM never imagined, and that’s with the pistons. When the engine is working hard, the turbocharger is drawing in a ton of air, and the restrictive stock turbo inlet tube can effectively choke the VGT turbocharger causing the compressor outlet temperature to skyrocket, heating up the intercooler, and ultimately raising the temperature of combustion and the coolant temp. 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. Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running from 2001 to 2005, and the six-speed starting in 2006 and running until 2019. Unsubscribe any time. Nearly all Duramax powered pickup trucks were equipped with the Allison 1000 automatic transmission, with the five-speed version running from 2001 to 2005, and the six-speed starting in 2006 and running until 2019.

The 6.6L Duramax has been in production since 2001 and has proved, on a large scale, to be a relatively reliable and durable platform. 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.

Get answers and make your voice heard! Just like the LBZ was the best pre-emissions Duramax, the L5P is the best post-emissions Duramax. I’ve seen a few 2017 and 2018 L5P’s come up for sale private party. are trademarks of Autobeef LLC, All rights reserved.

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY 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.

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. 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. ...$30.000. On paper, higher fuel pressure sounds good, but you can’t talk about common LML problems without mentioning the ticking time bomb of an injection pump. Just wish the emissions would stop messing with the diesel engines. Please post your good and bad experiences with the 2017+ L5P. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement. And that is certainly... 2021 Chevy Chevelle Horsepower – Typically the any brand-new 2021 Chevy Chevelle will likely be a significant unique automotive that can be published with Chevy to generally be rivalling from... 2021 Chevy Chevelle Engine Specs – Your any completely new 2021 Chevy Chevelle has to be a significant different sports car that might be made available just by Chevy to... 2021 Chevy Chevelle Release Date – This any brand-new 2021 Chevy Chevelle has to be a serious latest vehicle which will be discharged just by Chevy to become competitive inside... ...or truck would be using, it will likely be ranged as a result of the quantity of $30.000. If there is even the slightest bit of air in the fuel or worse yet contaminants like dirt or rust, you can bet the internal parts of the injectors will wear prematurely and you’ll be doing an LB7 injector change. Simply put, they can crack under pressure. 2019 Chevrolet Silverado Concept Exterior, Interior, Engine, Price, 2019 Chevy Silverado Trail Boss Design, Release Date And Price, 2019 Chevy Silverado 1500 Interior, Exterior, Release Date, Engine, 2019 Chevy Silverado Exterior, Interior, Engine, Price, 2019 Chevy Silverado Forum Interior, Price, Release Date, 2020 Chevy Impala Interior, Release Date, Engine, Price, 2021 GMC Savana Engine, For Sale, Interior, 2022 Chevy Bolt Price, Release Date, Changes, 2020 Chevy Silverado 1500 LT Trail Boss Concept, Interior, Engine, Release Date And Price, 2021 Chevy Silverado HD For Sale, Review, Specs.
Check out other resources here: Your email address will not be published. Because of the nature of the CP4 failure, large amounts of metal shavings are produced inside the pump, and they get sent straight into the rest of the fuel system which contaminates pretty much everything.

And that is certainl 2019 Chevrolet Silverado 2500HD LTZ The l5p duramax is very powerful. When GM changed body styles in 2008, the redesign coincided with some new regulations from the EPA regarding emissions equipment on light duty trucks. Just like an LB7, you can install a lift pump with better filtration which helps to clean air and debris out of your fuel which will minimize wear and extend pump life. We know today LB7 injector failure is a common problem, and because the operating tolerances inside the fuel system are so tight, proper lubrication from the diesel fuel is critical. Mechanically, the L5P is stout and very few major problems have been reported.

Get notified about new defects, investigations, recalls & lawsuits for the. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off. For more details about 2019 Gmc 2500hd Duramax Engine Problems, you can subscribe and find out the latest update! It was the first to come bolted to the six-speed Allison transmission which provides a lower cruising RPM and greater fuel efficiency when compared to the five-speed on the LB7 and LLY.


While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation.


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