Why is my Duramax diesel engine not working?

The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. 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.

Are there any problems with the LLY Duramax?

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

Why is my diesel engine surging at idle?

Fuel Pressure Regulator (FPR) is a device that is in charge of making sure the rail pressure is where it should be. Using a scan tool you can compare desired and actual rail pressures to often determine if there is a problem. If the engine is surging at idle (RPM fluctuations) it is a good indicated of a bad FPR.

What causes Honda’s idle speed to fluctuate?

There are many reasons your Honda’s idle speed fluctuates. I had to perform many different tests. I have success and failures. But eventually I fixed the problem or problems. By watching my video, hope it can save you the time and money. http://cartrek.com/idle-speed-fluctua…

Are there any problems with the Duramax diesel engine?

Overheating issues with the Duramax diesel seems to be a hit-or-miss problem; some owners experience it, while others never will. Regardless, it’s more common with the Duramax than other engines.

Is there a problem with the glow plug on my Duramax?

Often, you can verify the problem by wiggling the wires around the injector. If the problem goes away (even momentarily), you’ve identified the affected zone. Glow plug failure was a concern on the 2006 model year LBZ and LLY Duramax models, but the problem should have been long corrected for owners of these years.

What was the problem with the LBZ Duramax in 2006?

Glow plug failure was a concern on the 2006 model year LBZ and LLY Duramax models, but the problem should have been long corrected for owners of these years. The concern was that the glow plug module would over cycle the glow plugs, creating a scenario in which the tip of the glow plug could actually deform and/or break off in the engine.

What to do if your Duramax injector is not working?

To relieve this problem, the wiring harness (or affected portion of the harness) will need to be replaced/repaired. Often, you can verify the problem by wiggling the wires around the injector. If the problem goes away (even momentarily), you’ve identified the affected zone.

What kind of power does a Duramax have?

2008 Chevy Duramax has reduced power with check engine light on. 2008 Chevy Duramax has reduced power with check engine light on. Owner Brothers Restoratio… Owner Brothers Restoratio…

Is the Check Engine light on on a Duramax?

2008 Chevy Duramax has reduced power with check engine light on. 2008 Chevy Duramax has reduced power with check engine light on. I just changed the fuel filter on my 2016 duramax, I started it up to check for leaks and had left the air intake off. I now have a check engine light and … read more Vocational, Technical or Tra…

Why does my diesel truck have air flow problem?

If driving in blowing snow the truck will sometimes throw that code and you can find the air filter box full of snow. If working in alot of dusty spots might have a similar problem.

Is the Duramax 08 DMAX a good car?

Those being the only 2 things but i’d buy one again in a heart beat! From what I’ve heard, the 08 Dmax is pretty damn good, aside from less fuel mileage than the LBZ, but that’s to be expected with the emissions that all of the big 3 have to meet. I just can’t bring myself to embrace the new body style.

How much power does a Duramax Diesel have?

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.

Where is the CP3 injection pump in a Duramax?

The CP3 injection pump sits in the valley of the engine between the cylinder heads and is driven by the camshaft gear, and it has two main jobs: get fuel from the tank up to the engine, and pressurize the fuel to 26,000psi and ultimately inject it into the engine.

Are there any problems with the Duramax LMM?

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. Simply put, they can crack under pressure. There are a lot of factors which dictate the power level where a piston bites the dust, but it’s usually north of 600 horsepower.

Does the fuel filter need replacing?

Simply noticing a sudden drop in fuel efficiency is enough for the car owner to suspect that the fuel filter needs to be replaced. A rule of thumb for maintenance is that fuel filters should be replaced approximately every 24,000 miles or once every two years.

How often does fuel filter changed?

You must change your vehicle’s fuel filter at 50,000 miles. Subsequent filters should also be changed at least every 50,000 miles, but changing them annually is even better.

How do I replace diesel fuel filter?

How to Change a Diesel Fuel Filter Step 1 – Locate the Filter Step 2 – Detach the Old Filter Step 3 – Install the New Filter Step 4 – Clean Up Step 5 – Refill Fuel Lines with Fuel Step 6 – Dispose of Old Filter

How often should you change fuel filter for diesel?

For most Diesel trucks it is recommended that you replace your fuel filter every 10,000-25,000 miles depending on how you drive, how often you commute and what type of vehicle it is. Most cars will have information on how frequent you should change the fuel filter in the owner’s/maintenance manual.

What causes low fuel pressure in GMC Duramax?

2002 GMC 2500 CODE 1093 REMAND INJECTOR FROM GM DEALER INSTALLED . SYMPTOM ARE LOW FUEL PRESSURE … read more Vocational, Technical or Tra… 2006 GMC 3500 Duramax w/ 150,000 – engine light comes on and limits to 2,000 RPM when under load starting to pull trailer uphill.

What are the most common LMM Duramax engine problems?

1 DPF system & active regeneration 2 Leaking transmission lines 3 Fueling / low fuel pressure 4 Piston / crankshaft failure 5 Allison 1000 power limitation

Are there any issues with the Duramax primer button?

Under the primer button there are some orings that fail on a regular basis. This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs.

Why is my Chevy 2500HD oil gauge not working?

04 2500 HD DURAMAX DASH PROBLEMS. Tach works for awhile then stops altogether, will work when I drive the next time. Know my oil gauge is acting up. Checked with GM dealer, they informed me that the warranty on the dash ran out at 70,000mi. (85000) when my problems started. Whole panel has to be replaced. 04 2500 HD DURAMAX DASH PROBLEMS.

Is there a problem with my GMC guage?

That took care of my security issue I had a few weeks back. This almost sounds like the problem that im having, Did you figure it out?

How to tell if your Duramax Diesel Turbo is gone?

If you can’t find the appropriate fitting, check boost at one of the vacuum ports. With the gauge connected, open the throttle and check the peak boost. All models should check in at 20 psi of boost maximum, with the rpm at about 1,800 for 2003 to 2004 LB7 motors and 1,600 for all others.

What was the code name for the Duramax in 2011?

In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML.

What kind of problem is a Duramax Speedo?

Its an 03 sierra 6.6L Duramax. This problem has been on going for a good year at least. My speedo has been dysfunctional for a year or so. I have been using my Kenwood in-dash DVD player with Garmin GPS for the speed. Basically, I put my key in the ignition and the whole dash cluster goes nuts.

What kind of transmission does a Duramax pickup have?

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.

What to do when your GMC Truck won’t shut off?

Might have a system that keeps running until oil cools to a certain temp to keep from blowing the turbo? Should shut off when tapping the brake when key is removed though. Click to expand… Start by disconnecting the aftermarket alarm and see if it still happens. And next time just pull the fuel pump relay it’s easier.

How to repair a LB7 6.6 Duramax engine?

We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.

Which is the best 6.6 Duramax engine to buy?

Just like the LBZ was the best pre-emissions 6.6 Duramax engine, the L5P is the best post-emissions Duramax. All the problems associated with emissions system and injection pump have been taken care of, and for 2017 GM switched suppliers of the injection pump from Bosch to Denso.

Why does my GMC Duramax have reduced engine power?

It keeps getting a “reduced engine power” message on the dash, then it doesn’t have any power, its like putting a brick under the gas pedal. I have went to the dealer and they cleared the code so they could try to duplicate the code, which it never came back for them.

What’s the RPM on a 2005 GMC Duramax?

Check out the thread “2005 6.6 max rpm 2000”, there are some suggestions there. Also search for the “ice pick trick” as it is one of the suggestions that often comes up for this problem.

Are there any issues with the Duramax pickup?

This can produce long cranks and hard starts. Glow Plug System Issues – Nearly half of the check engine lights that come in for the Duramax pickups are for glow plugs. The glow plugs burn out over time and can be a real nuisance to remove from the aluminum heads sometimes.

How many versions of the Duramax diesel engine are there?

All told, there are six different iterations of the Duramax diesel engine: LB7, LLY, LBZ, LMM, LML, and L5P spanning from 2001 to the present day. Each version of the engine has its own issues and quirks, and some are less problematic than others.

Is it possible to get 30 mpg with a diesel truck?

New diesel trucks are getting more expensive, so it makes sense that owners are trying to keep their older rigs on the road longer and get good gas mileage at the same time. It may be possible to upgrade some of your diesel truck parts for better performance and fuel economy. Let’s take a look at how to get 30+ MPG with a Duramax.

Why do I get less mpg with a Duramax engine?

Service and maintain your Duramax truck regularly. Failing or worn Chevy Duramax parts can be culprits in reduced fuel economy. The average MPG for a truck with a Duramax engine varies depending on the truck model as well as on which Duramax engine it has.

Is the GMC Duramax compatible with diesel fuel?

The Detroit News reports that GM is now facing a class-action suit alleging its 6.6-liter Duramax engine found in 2011-2016 Chevrolet and GMC models is not compatible with US diesel fuel.

Why does my GMC diesel engine not work?

American diesel fuel is thinner than its European counterpart, allowing for air pockets that cause the metal to rub against metal and create shavings. “The pump secretly deposits metal shavings and debris throughout the fuel injection system and the engine until it suddenly and catastrophically fails without warning,” the lawsuit alleges.

Why does my GMC Sierra engine not start?

There are a lot of issues that can cause your Sierra to crank, but not start. The engine needs air, fuel, and a spark in order to run. It is highly likely that if the engine is cranking, but not starting that it has thrown an OBDII code.

What makes a Duramax LB7 diesel so special?

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.

What kind of transmission does a Duramax diesel use?

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.

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.

What should the oil pressure be on a Chevy Duramax?

Lb7 – 15w, 80lbs on start up at 20°. Then at temp about 30 according to the gauge. These are high volume low pressure pumps. Lb7 – 15w, 80lbs on start up at 20°. Then at temp about 30 according to the gauge. These are high volume low pressure pumps.

What should I run for lubrication in my Duramax Diesel?

Get some aluminum foil and form a slide and tuck it under the filter and just let the oil flow down it. No mess. I’d run some kind of diesel fuel additive for lubrication as injector and pump failures are one of the more prevalent issues.

In an effort to keep up with the ever-tightening emission regulations, GM redesigned its Duramax for the 2011 model year, and this time the code name was LML.

What is the diagnostic code for a turbo problem?

P0045 is a diagnostic trouble code for “Turbo/Super Charger Boost Control Solenoid Circuit/Open.” In the simplest of terms, this particular code indicates that the Engine Control Unit has detected an abnormal reading in the supercharger boost control circuit or turbocharger.

What is the diagnostic code for a Chevy Duramax?

Below are common check engine light trouble codes for the Chevy/GM Duramax diesel. This list has been updated to includes Chevy/GM Duramax diagnostic trouble codes. At Thoroughbred Diesel we are a real diesel performance and repair shop that offers free advice. Call us at 1-866-737-4966 with any questions you may have about your diesel.

What is the trouble code for a Chevy?

List of Chevy Trouble Codes (DTC) P0100 Mass or Volume Air Flow Circuit Malfunction. P0101 Mass or Volume Air Flow Circuit Range/Performance Problem. P0102 Mass or Volume Air Flow Circuit Low Input. P0103 Mass or Volume Air Flow Circuit High Input. P0104 Mass or Volume Air Flow Circuit Intermittent.

Are there any problems with the Duramax engine?

The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.

What causes the crankshaft on a Duramax to crack?

Or how about the fact that the rods in the LB7 and LLY engines can bend with added power and the LBZ and LMM mills are notorious for cracking pistons? Discover the worst failure point (s) of your Duramax in the article that follows, along with how to address it. 1. Snapped Crankshaft

When does DTC put a car in limp mode?

When the engine control module, transmission control module or brake control unit (ABS) detects a problem in the engine, transmission or with the brake system, it will store a trouble code in your DTC memory. If one of the control units decide that the problem is dangerous for the engine or transmission, it will put the car into limp mode.

Are there any flaws in the Cummins Duramax?

Still, and just as we exposed the shortcomings of the almighty Cummins, the Duramax isn’t without its flaws—some of them catastrophic. For example, did you know the injection pump on the LML version is prone to coming apart and wrecking the entire high-pressure fuel system when it does?

Are there any major problems with the L5P duramax?

Mechanically, the L5P Duramax is stout and very few major problems have been reported. 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.

What should I do if my fuel pump is low?

The first thing you can do is to check the screen filter. The screen filter protects the fuel pump from dust and debris and can get clogged up pretty quickly. This can hinder the flow of fuel to the fuel pump and into the cylinders. So, it is better to clean the screen filter and replace it with a new one if needed.

Why does my Nissan Titan smell like diesel?

When the diesel engine goes into dpf regeneration mode, the cab of the vehicle fills with unpleasant fumes that smell like evaporated diesel fuel or other noxious substance that is irritating to mucous membranes and may cause health issues.

Why does the fuel pump not release the fuel?

The fuel pump is able to create pressure using electricity but if it is not getting the adequate voltage of electricity, it will not be able to function properly. Consequently, the fuel will not be released at the perfect pressure and your car will lose efficiency. Although, voltage fluctuation in a car is rare, it is not uncommon.

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