Each cylinder inside the engine has its own injector that delivers fuel to the corresponding cylinder. Whether you are upgrading or replacing a worn a faulty injector, removal only requires simple tools and little knowledge. An injector can be removed from a diesel engine in about 30 minutes.
Replacing a fuel injector seems like a daunting project, but with a little skill you can do the job yourself and save serious money. Shops charge a huge amount for fuel injection work. If you know that you have a bad injector, the job can be done at home.
On average, you can expect to pay between $350 and $850 to replace your fuel injectors. The range of costs depends on a number of factors. Smaller vehicles with fewer cylinders requiring less expensive parts will come in at the lower end of the spectrum.
Depending on the make and model of your car, the average fuel injector replacement cost will run you about $800 to $1,450 for a full replacement. If you have the knowledge to do the replacement yourself, the parts alone are around $600 to $1200, while the labor cost is only about $200 to $250.
Yes you can, but for the labor price of replacing just one injector, you might as well replace the whole set of fuel injectors. Getting fuel injectors replaced can sometimes cost hundreds of dollars in labor labor if you don't do it yourself, making it quite expensive.
Here are a few signs there might be something wrong with your fuel injectors.
- The Engine Misfires. Dirty fuel injectors may cause your vehicle's engine to misfire.
- Idling Gets Rough.
- Your Gas Mileage Tanks.
- The RPM Needle Starts to Dance.
- Your Car Won't Start.
There is a multitude of symptoms your truck will experience if the injectors are going bad. One of the first signs we see are excessive smoke/haze. You will notice your truck billowing out a little more smoke than usual or hazing at idle. Another issue you may notice is high EGTs.
For most buyers the first set of injectors will likely have already been taken care of since the failure usually occurs between 100,000 and 150,000 miles.
However, early Duramaxes aren't problem free. The biggest issue with '01-to-'04 and 1/2 LB7 engines is their fuel injectors' propensity to fail, typically before an engine reaches 100,000 miles.
A poorly-maintained engine can quickly fall into disrepair before it even reaches the 100,000-mile mark while a well-maintained Duramax pickup truck should last 400,000 or even 500,000 miles.
Released in 2017, the L5P is the latest a greatest version of the Duramax. It is substantially more durable than previous Duramax models and features an impressive 445 HP and 910 lb-ft of torque. The L5P replaced the LML in Chevy Silverado pickup trucks.
The Duramax is probably the most responsive to an aftermarket lift pump. The GMC and Chevy Duramax pick-up trucks do NOT have a lift pump to supply fuel to the engine. Therefore because the fuel is under constant suction it causes cavitation and excessive wear and tear on injectors and your injection pump.
You're looking at ~$3000+ to rebuild one if you do it yourself depending on how far you decide to go and what machine work you'll need.
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.
It's about $1200- 1500 for parts, replace the bolts with ARP studs, and use grade "C" gaskets.
Thankfully, the LB7 injector problems were resolved, but some new problems revealed themselves. Some of these 6.6L LLY Duramax engine problems stem from the fact that it has significantly more horsepower and torque compared to the original Dmax. In fact, a number of other common 6.6L LLY Duramax problems exist.
The Duramax uses a common-rail system, where high fuel pressure is always available to an electronically controlled fuel injector and it is the injector itself that controls the fuel that is delivered to the combustion chamber.
The LB7 Duramax diesel is a direct-injected, turbocharged, intercooled, four-valve-per-cylinder V-8 that produces 300 hp and 560 lb-ft of torque. Starting from a blank sheet of paper, the 6.6L Duramax is recognized to date as the fastest diesel development program in the world.
The LLY (internally called the 8GF1) (engine code "2") is a 6.6 L; 403.9 cu in (6,619 cc) turbocharged engine which debuted in mid-2004 and continued until the end of 2005. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads.
Any generation duramax will pull a 3 horse trailer handily. They all have their own quirks and issues that can be resolved, and once they are, you've got a reliable, strong truck for many miles. Most will say the 06-07 LBZ model to be the most desirable and reliable platform.
While fuel injector problems usually give warning, driving your vehicle for a long time with a clogged or faulty fuel injector can cause problems. Increased fuel consumption. A noticeable increase in tailpipe smoke and emissions. Rough idle and hesitation during acceleration.
Depending on on the rebuilder, a Duramax engine replacement is going to cost at least $15,000. Depending on the year and other potential issues or wishes of the customer, you could expect a range likely between $15,000 and $25,000 for Duramax engine replacement.
Clogged filters and injector deposits will cause an uneven or incomplete fuel burn, resulting in the area of the vehicle around the exhaust to be dirty and the release of white smoke from the exhaust pipe. Increased fuel consumption and poor miles per gallon.
When viewing the rates, a cylinder with (+) means that its injector is using more fuel than the average fuel rate and a (-) translates to less fuel. GM states that balance rates should be no more than plus or minus 4 (+4/-4) in park at operating temperature.
LB7 injectors fail whether you add extra filtration or not. They fail whether you use additives or not. They fail whether you add a lift pump or not.
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.
