Best Injectors for 5.9 Cummins Common Rail

We recently published a guide with a review of injectors for the Cummins 6.7L and were asked to do the same for 5.9L but with rebuilt units. OK, so let us start by stating that rebuilt is fine, its budget-friendly, it’s not new, but heck, it’s just as good as a new one when you buy it from a reliable source.

The 4 Best Injectors for 5.9 Cummins Common Rail:

1. Luqing 1pc Rail Injector for 03-04 Dodge fit For Cummins 5.9L Diesel 305HP (1004-6) – the best injectors for 5.9 Cummins Common Rail
2. Luqing Set of 6pcs Rail Injector For 03-04 Dodge Cummins 5.9L Diesel 305HP (1004-6)
3. Luqing 1PC New Common Rail Injector with Connector Tubes for 03-04 Dodge fit For Cummins 5.9L Diesel 305HP (1004-6)
4. DCP Products Diesel Care 5.9L Common Rail Rebuilt Injector fits a 2004.5-2007 Dodge Cummins

Top-Rated Injectors for 5.9 Cummins Common Rail List:

	Product name	Photo	Features	Pros	More information
	1. Luqing 1pc Rail Injector for 03-04 Dodge		This is the rebuilt Luqing 1 pc injector for Cummins 5.9L	•Budget-friendly •1 Pc (buy as many as you like)	More Information
	2. Luqing Set of 6pcs		This is the Luqing Set of 6pcs Rail Injector For 03-04 Dodge Cummins 5.9L Diesel 305HP engines.	•Full set of 6 •New copper crush washers and O-rings	More Information
	3. Luqing 1PC New Common Rail Injector		This is the rebuilt Luqing 1 pc injector with connector tubes for Cummins 5.9L	•Budget-friendly •Connector Tubes	More Information
	4. DCP Products Diesel Care 5.9L Common Rail Rebuilt Injector		This is the DCP Products Diesel Care Cummins 5.9L Common Rail Rebuilt Injector	•Made in the USA (What?) •1 Injector (buy as many as you like)	More Information

REVIEWS YOU CAN TRUST 

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Now, there are a lot of reasons why you must replace your old injectors, and these reasons include bad, faulty, dirty, clogged or leaking cummins injectors. These symptoms will present themselves lamely at first, as smog, poor idle, failed emissions, and overall poor engine performance.

In most cases, your engine will not reach its full RPM, or you will notice an increase in cummins diesel consumption. Other symptoms include rough engine diesel performance, surging and bucking when changing gears and throttling, excess smoke from the tailpipe and engine Knock or that OMG detonation which leads to complete engine failure.

Leaking Injectors increase your  fuel system consumption and are also a serious fire hazard. These leaks lead to oil thinning and hydro lock which in turn leads to catastrophic engine failure. Replacing your old cummins injectors with new injectors is a must, and you don’t need to buy original industrial injection, bosch injectors, or new injectors, you can buy rebuilt ones too.

Best injectors for Cummins 5.9L Common Rail Reviews:

1. Common Rail Injector for 03-04 Dodge Ram Cummins Truck 5.9L Diesel 305HP (1004-6) – best injectors for 5.9 Cummins

These are OE specification rebuilt injectors that have been rebuilt to provide improved mileage performance and deliver a smooth clean idle with a slight gain in HP.
All Luqing parts come with new copper crush washers and O-rings for installation.

2. Common Rail  Set of 6pcs Rail Injector For 03-04 Dodge Cummins 5.9L Diesel 305HP (1004-6)

These refurbished performance injectors, for the 2003-2009 Dodge Cummins 5 9L Diesel 305HP (part no. 1004-6) is rebuilt with OE Specifications and each industrial injection is carefully calibrated to improve the mileage consumption, deliver a smooth idle and give a slight increase in HP.

This set of 6 comes with new copper crush washers and O-rings and are easy to install.

3. Luqing 1PC New Common Rail Injector with Connector Tubes for 03-04 Dodge fit For Cummins 5.9L Diesel 305HP (1004-6)

These are OE specification rebuilt injectors that have been rebuilt to provide improved mileage performance and deliver a smooth, clean idle with a slight gain in HP.

4. DCP Products Diesel Care 5.9L Common Rail Rebuilt Injector fits a 2004.5-2007 Dodge Cummins

This is the DCP rebuilt injector for 2004.5-2007 Dodge Cummins HPCR “600” engine, fits 2004.5, 2005, 2006, 2007 and you don’t pay for the core up-front. The core is charged if you do not return it. Otherwise, you get an exceptional injector rebuilt in the US of A.

Tips

How to recognize a clogged injector

A clogged injector will sometimes assume the patterns of a bad coil or broken plug wire, and in some cases even imitate a bad spark plug. This is why you need to check your performance injectors when these symptoms occur, even if you think it is something else.

A clogged injector is a poor piece of machinery that is so full of gunk, old fuel, carbon powders and other residues that it also leads to filter baskets clogging up as well. This is due to poor maintenance, and a clogged fuel injector will prevent the fuel system from reaching the engine. Basically, a clogged fuel injector means you treat your engine badly.

The only way to prevent clogging is to check your performance injectors more than once a year (at least), preferably once every half a year, and if you are into heavy off-road driving or heavy load driving, you need to check them once every two to three months.

If your industrial injection is clogged there are only two alternatives; the first is to replace them, the second is take them out and get them cleaned professionally. I personally suggest you forget this option and change them.

Once you do realize that you need to change your industrial injection, I suggest you consider taking up a monthly preventative maintenance review of your engine’s performance, buy an engine tuner and get all the info on diesel performance. It will help you locate and focus on problem areas. It will also make your life easier and less expensive to manage.

How to recognize dirty fuel injectors

OK, not if you have dirty fuel injectors, which is one level down from clogged, you still have a chance to clean them in the engine, but you had better recognize this issue fast. The fact that you caught your cummins injectors when they were only dirty means you do take care occasionally, and that’s a good start, but not enough.

A dirty industrial injection has an accumulation of hydrocarbons and additives mixed in with the gunk and carbon that will lead to a clogged injection.

The bottom line is you need to clean them fast, either in the engine, or I suggest you take them out and get them cleaned professionally for extra precaution.

If you maintain a good preventative maintenance code, you will always clean your cummins injectors on a regular basis, and this will prolong their life as well as your engines life.

How to recognize a faulty rebuilt injector

Remember, your Dodge Ram 5 9L Cummins Diesel is a beast, but its engine is delicate, and just like the human body, if you don’t care for it, you will end up killing it. Injectors are key in the performance of the engine, they are like the arteries in your heart, if they go kaput, so does your heart, and if the industrial injection go kaput, so does your engine.