Are there any issues with the Duramax fuel pump?

The new injectors available from us and others are updated and do not have the cracking issue. Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.

What happens to the head gasket on a Duramax?

Head Gaskets – As these truck reach the 100,000-150,000 miles we are seeing more and more head gasket issues. The Duramax has a multi-layer steel head gasket. When they have issues, they do not typically smoke out the exhaust or get coolant into the cylinders. What happens is the head lifts a little during the compression stroke.

What causes a fuel filter to leak on a Duramax?

Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.

Are there any issues with the Duramax check engine lights?

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.

What causes a Duramax Diesel to lose power?

Vocational, Technical or Tra… Duramax Chev. P.U. (2003) loses fuel prime and motor stops running at low RPM or at an idle. No visible leak around filter area. Fuel pressure … read more Vocational, Technical or Tra… Hi, I just purchased a 2004 Kodiak C4500 crewcab with the Duramax diesel engine mated to an Allison with 4:44 gear ratio.

Where did the smoke come from in my Chevy Duramax?

As I tried to keep the truck moving enough to pull off to the side of the road, blue/white smoke came pouring out of the right front fender well so we stopped and bailed out. The smoke stopped immediately and 30 minutes later I was able to drive the truck again.

Can a GMC Duramax run with no trailer?

Dropped the boat, let it sit a while then it ran great with no trailer. Took it back and they replaced “some fittings”. So 2 months later, I don’t fish near enough, I drove it 8 hrs to the coast and hooked up to a boat. It ran about 5 miles. Same thing , light comes on loss of power but can feather it up to 40-50 but cant push it.

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.

What to do if your Duramax cooler goes bad?

Lastly we replace a fair amount of glow plug controllers as well. You will usually get a diagnostic trouble code for the cooler when they go bad. Head Gaskets – As these truck reach the 100,000-150,000 miles we are seeing more and more head gasket issues. The Duramax has a multi-layer steel head gasket.

What causes white smoke in a GM 6.6L Duramax engine?

A common issue with the GM 6.6L LB7 Duramax engine is white smoke at idle. Worn and damaged injectors are often the cause however there are other causes and considerations that should be looked at prior to injector replacement. INJECTORS STUCK OPEN OR WITH EXCESSIVELY LEAKING NOZZLES DIANOSIS 1.

What kind of problems does a Duramax engine have?

The 5 Most Common LB7 Duramax Engine Problems 1 Fuel Injector Failure 2 Water Pump Failure 3 Fuel Filter Housing O-ring Leaks 4 Blown Head Gasket 5 Overheating (fan clutch problems, radiator gunk)

What happens when you have bad injectors in a Duramax?

You’ll also experience loss of power, excessive smoke, rough idling, and engine misfiring. Here are common issues experienced when you have bad injectors. Fuel in Oil. Check Dipstick look for a surplus of oil or even smell the dipstick. When fuel is present, you can often smell it.

What are the most common 6.6L LB7 Duramax problems?

What Are The Most Common 6.6L LB7 Duramax Problems? The LB7 Duramax engine made its debut on Chevrolet and GMC HD trucks in 2001. These diesel engines are where the Duramax started, and they have been so successful that the Duramax are still used in GM HD trucks today.

Why did my 2004 Duramax engine not start?

My 2004 Duramax started and then died like it was out of fuel. Now it won’t start. I have about 1/4 tank of fuel, tried priming it until the batteries died.

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.

Why is my Duramax diesel engine not starting?

I have seen more leaks causing no starts, loss of prime and low fuel rail pressure codes from poor fitting aftermarket fuel filters use Delco only. Remember when dealing with power loss and fuel pressure issues the duramax has no in- tank or frame mount fuel pump pushing fuel to the engine.

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.

What are the most common Duramax 6.6L engine problems?

5 Most Common LBZ Duramax 6.6L Engine Problems. 1 1. LBZ Cracked Pistons. The LBZ is revered for its tune-only performance capabilities. With various upgrades, this engine is easily capable of 2 2. Duramax LBZ Water Pump Failure. 3 3. Glow Plug Failure – LBZ. 4 4. Allison 1000 Transmission Line Leaks. 5 5. Duramax EGR Problems.

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.

When did I Buy my 2006 Duramax Diesel?

It was a lease return when I bought it in June 2007 with high mileage for its age, but did not appear to have been abused. Are there any known serious problems with the 2006 Duramax, or things that I should watch for?

Are there any problems with the Duramax water pump?

This seems to be inherent of the factory water pump design. 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.

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.

Can a 2003 Cummins have a hard start?

One of the most common calls we get are from customers with a 2003-2007 Cummins that have developed either a hard start or no start condition. In order to help out, we had our very own Tyler Lucas, put together this step by step tutorial that you will hopefully find insightful.

What causes a ram truck to not start?

First off, let’s get this out of the way, Ram trucks NEVER had the best luck with lift pumps. A lack of lift pump flow will not only cause a no start issue, but depending on how it failed, can cause other issues that we will discuss further into this post. The factory lift pumps on the 2003-2007 Cummins produce a dismal 10-11.5 PSI at idle.

Why is my Duramax fuel rail pressure so low?

This is a very common problem that we hear about from our Duramax customers. Actual fuel rail pressure is not keeping up with desired fuel rail pressure. This may only happen in high fuel demand situations like towing or racing but it can also happen with everyday use.

Where does the fuel leak go on a Duramax?

Fuel leaks on a duramax are almost always on the return side of the system, the smaller of the two fuel lines traveling down the frame rail, going to the fuel cooler and back to the tank. They can leak at the cloth covered rubber return lines at the injectors, these lines can only be replaced in sets left and right side, they are expensive.

What are the symptoms of a bad Duramax fuel regulator?

Common Duramax Fuel Pressure Regulator Problems 1 Black Smoke. As we’ve said before, one of the most common problems that fuel pressure regulator experience is black smoke. 2 Strong gas smell. What are some of the most common symptoms of a bad fuel pressure regulator? 3 Hesitation on the gas pedal. 4 A decrease in power acceleration.

What causes a Duramax injection pump to fail?

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. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

What to do about a Duramax 6.6 LB7 engine?

If you are having a problem with your 2001-2004 Duramax 6.6 LB7 diesel engine, please feel free to give us a call. 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.

Is the water pump on the LB7 Duramax leaking?

Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump. Be prepared though because you will have to remove the dampner pulley to get the pump off.

How much does a Duramax lower radiator hose O-ring cost?

Rather than buy the new hose just to get the O-ring I did much recon (including seeing JtJasper2002 on eBay selling the O-ring for $20). With apologies to JtJasper, I’m going to reveal his secret. It’s a Silicone 70 Durameter -226 (2″ ID, 2 1/4″ OD by 1/8″ width) O-ring.

Why is my lower radiator hose leaking on my Duramax?

Hey guys I recently had my lower radiator hose o-ring start leaking on my lmm duramax. Every where I’ve read nobody knew where to get just the o-ring. Which resulted in a bunch of guys buying the new hose assembly just for the o-ring.

How long does it take for Duramax radiator hose to ship?

. Only 5 left in stock – order soon. . Usually ships within 3 to 5 weeks. . Only 9 left in stock – order soon. . Only 14 left in stock – order soon.

Why is my diesel engine hard to start?

The problems that can occur due to the cold weather are well-known and fairly common, such as using summer-grade fuel in winter, a bad glow plug system, slow cranking, or thick, cold oil. However, in summer the problems tend to be quite different. Here are a few different issues to consider if your diesel is a hard start.

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 does my Duramax not start after running?

Usually they don’t want to start after they have ran for a while when you have injector fuel return issues. That’s why I’m leaning toward something electrical. I have used the crap out of starting fluid. Its usually getting the air out out of injector lines on mechanical injection systems after pump and or injector replacement.

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.

Can a Duramax diesel engine be kept warm?

Huge no-no for modern diesel engines as your grid heater in the intake and glowplugs stay on until the truck is “warm”. Also sometimes rebuilding the filter head isn’t enough, you have to replace it. Click to expand… Yeah I wasn’t to fond of spraying it.

What happens when a Duramax engine goes down?

Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.

Are there any problems with my 2003 Duramax?

Thaks for the help. injectors,water pump,headgaskets,injectors again,instrument cluster,steering shaft,pinion seal,and injectors again. I have on 03 with 66,000 on it and know problems. Friend of mine has 03 asmost same truck and know problems with 145,000 on it. Sure love mine. P:S Injectors should be warrantied to 200,000.

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.

When did GMC Duramax lose power under load?

In 2012 there was a P1093 code and the dealer invoice states “…low rail pressure during enrichment. Command high fuel rail pressure, pressure drops. Follow diagnostic chart, test system pressure, relief valve failed” so they replaced the FPRV.

What causes a Chevy 2500HD to lose power under load?

Probably P0087. Check the fuel hoses at the side of the trans– they can get kinked, weak and collapse. I’ve just experienced a very similar situation with my 2005 2500HD. After driving about 2 hours, over varying terrain, I had to stop at a light (not the first on the trip).

What causes a Duramax diesel engine to heat up?

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.

Are there any problems with the Duramax fuel pump?

It can also be relatively difficult to prime the fuel system once air has been introduced into the system, such as when the fuel filter is changed. The 2001 to 2004 LB7 fuel filter housings seem to be the most prone to problems. Water pump failures for Duramax engine are somewhat common.

Are there any problems with the Commons 6.6L Duramax Diesel?

Common Problems with the 6.6L Duramax Diesel. 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. While various versions of the engine have surfaced over the years, all generations of the Duramax are based on the same foundation.

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 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.

How many KMS does a Silverado Duramax get?

There is about 105000 kms or 65000miles. The black smoke is gone now, just left with a lack of power and crappy fuel economy. I talked to a guy last night that has the same truck, but an 07 and he gets about 650kms to a talk, I get 300kms! I’ll see if I can get one of those filters locally.

How often does fuel pressure surge at idle?

Watching the fuel pressure at idle stays around 5200psi and when it surges up goes to around 9000psi. It’s up and down about every 15 seconds. And you can also feel it at a slow speed. Could someone lead the right direction, I do automechanic by trade I just don’t do a lot of diesel work.

Are there any problems with the LB7 Duramax?

It is extremely important to have the heads surfaced flat before putting the truck back together. Water Pumps – Another issue with the LB7 Duramax is the water pump leaking. This one is fairly common and unfortunately a huge pain in the butt to change. Water will seep from the underside of the pump.

Why did my GMC truck engine die while driving?

The positive battery cable was coroded and chewed up. Replaced it and all has been well.

Why did my fuel pump die while driving?

Sounds fuel pumpy. i was on my way home tonight and it did it again randomly. im almost certain from researching that its my fuel pump cause once it starts to die i tried flooring it and it did nothing. is there anyway i can check to make sure its the fuel pump before i fork out almost 200 on a new one and come to find out thats not the problem?

Are there any issues with the Duramax fuel pump?