5 Best Injectors For 7.3 Powerstroke Reviews

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The 7.3L Powerstroke’s manufacturing was seized around 18 years ago.

The vehicles that used this engine, such as the Ford Super Duty trucks, are still being used, with most of them racking up hundreds of thousands of miles.

Whether it be this engine or any other, after so much usage, it is expected that the fuel injectors might be worn out and need replacing.

And if you are reading this article, you must know what effect a bad fuel injector has on a vehicle.

That is why I have compiled a list of the best injectors for 7.3 Powerstroke, which will meet and exceed your expectations. You will notice improved mileage and performance.

So, let’s get straight into it!

5 Top Rated 7.3 Injectors Comparisons

Delphi EX63803AD Diesel Injector

Delphi EX63803AD Diesel Injector

GB Remanufactured Fuel Injector

GB Remanufactured Fuel Injector

HEUI Injector For Ford 7.3 Powerstroke

HEUI Injector For Ford 7.3 Powerstroke

Platinum Remanufactured Fuel Injector For 7.3L Powerstroke

Platinum Remanufactured Fuel Injector For 7.3L Powerstroke

Bostech Remanufactured Gold Series Fuel Injector

Bostech Remanufactured Gold Series Fuel Injector


1. Delphi EX63803AD Diesel Injector

Delphi EX63803AD Diesel Injector

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11/10/2023 06:28 pm GMT

Coming up in the first place is a product by the brand Delphi.

Never has it happened on any of my lists, but this time taking up the most fought for the spot is a rebuilt injector instead of a new one.

There are many reasons for how and why a remanufactured one took the lead, and we will be discussing that.

Since remanufactured injectors have been used previously so most companies get their hands on such items using a core policy, but that is not the case with the Delphi one.

They guarantee that these have been disassembled fully, cleaned, and checked for all sorts of damage and faults which may have occurred while under use by the previous owner.

Then those faults are fixed and ironed out. After complete assembly, the injector is tested against strict OEM specifications to ensure it is ready for consumer usage.

The brand also replaces some of the old parts such as the nozzle, screws, check balls, and O-rings. The replacements are 100% brand new, meaning they will not be faulty on arrival.

Lastly, the product itself also comes with a twelve-month warranty, which ensures that if any faults may have emerged due to improper workmanship, the injector is eligible for a free-cost replacement.

The only drawback of this one, that may vary per consumer basis, is that there are no core refunds.

That means you will not be able to get a rebate by sending the old injector back in.

  • Meets strict OEM specifications
  • Fully disassembled to ensure there are no faults
  • Nozzle, screws, O-rings are brand new
  • One-year warranty
  • No core refund

This one is a product that may be the excellent option out there, as it has no real drawback and have reviews that have nothing to say but positive things about it.

2. GB Remanufactured Fuel Injector

GB Remanufactured Fuel Injector

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11/10/2023 04:48 pm GMT

Coming in second place is another rebuilt injector, this time by the company GB Remanufacturing.

These GB Remanugactured Fuel Injectors earning a better spot are not only because they have similar or better performance than new ones, but that buyers prefer rebuilt ones too.

That may be due to the enormous savings, which increase if the brand offers a core policy. This product comes in singles instead of a pack.

Although it is recommended to replace all injectors in one go, it is good to know that there are options when a person needs to buy only one.

The brand itself has 30 years of experience behind it, so you can be sure they know what they are doing.

This one does have a core charge which is applied at the time of purchase. You have to send the old injector back.

Now, depending on the condition of the injector, you will receive the refund amount. If it is cosmetically rough, then you will get some or none of your money back.

But it does reduce the cost of the purchase. These have been tested to ensure they meet strict OEM specifications.

You can be sure that the product you receive has been vigorously tested under strict conditions.

There is a reason GB manufacturing is one of the number brands when it comes to reconditioning.

The only problem buyers had with these was that the O-rings were of inferior quality.

You can expect them to break within a year, so it is better to buy new ones separately. This creates a bit of a hassle.

  • Meets OEM specifications
  • Has a core policy
  • Experience brand
  • Offered in singles
  • Prone to failure O-rings

Although this product is excellent, the fact that one of the most essential parts of the installation, the O-rings, is prone to failure within one year of usage, if that was not the case, then perhaps it may have even earned the top spot on this article.

3. HEUI Injector For Ford 7.3 Powerstroke

HEUI Injector For Ford 7.3 Powerstroke
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Taking up the third spot is the HEUI injector by the brand Alliant Power. HEUI is short for Hydraulic Electronic Unit Injection.

This injector, unlike the previous two options, is a brand-new product. This means you don’t have to be worried about receiving a product receiving a faulty product.

But what makes this brand different is that they also have a core policy. This is strange because this policy is used by companies that recondition injectors and sell them again.

In this case, the brand ensures that the product you will be receiving is brand new. You can get up to $75 when you submit your old one.

The manufacturer assures buyers that their injectors are of unparalleled quality, and there are very few brands that may overtake them.

In this one, that number is two. Many things say this product truly is durable. The plunger has been coated using tungsten.

Moreover, the brand also claims that the product has been tested under strict OEM specifications, and it passes them all. This means that the injector is ready for everyday use.

Combine that with the fact that it has no problems as present in the original ones, such as cracking; it easily exceeds those specifications too.

It also comes with a two-year warranty which is not dependant on the mileage.

What this means is that you can test your injectors to the absolute limit, and no matter how much you drive your vehicle, if a fault arises within those 24 months, then it can be replaced.

Being a new one, this one does not have any faults or problems. The only thing is that they are expensive because they are new and not rebuilt.
  • Meets OEM specifications
  • Brand new
  • No faults
  • 2-year warranty
  • Expensive

It is no surprise that a new injector is costlier than a remanufactured one.

This one is a unique product because users did not have any issues with it, and it should be your go-to choice if you want a brand new one.

4. Platinum Remanufactured Fuel Injector For 7.3L Powerstroke

Platinum Remanufactured Fuel Injector For 7.3L Powerstroke
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11/10/2023 03:04 am GMT

Earning the fourth spot on this article is another remanufactured injector. Up till this point, it has been made crystal clear that users prefer rebuilt ones over new ones.

They dominate this article not only due to this reason but because they are extremely good and reliable.

In 7.3 Powerstroke, I can safely say that some of them exceed the performance of a new one too. The brand that rebuilds these injectors goes by the name of DCP Injectors.

They ensure people that these injectors have most of the parts replaced to ensure they will not have any of the original one’s problems.

The solenoid, the nozzle, springs, and even the O-rings are entirely brand new.

In most cases, the failure of these components affects the performance of the injector. They not only install new components and pack them up.

They have been tested under OEM specifications to ensure they will not fail on the consumers. It also comes with a one-year warranty.

You can buy this product with complete peace of mind that if any fault arises, then it will make you eligible for a full refund or free of cost replacement.

If you are having doubts about buying a reconditioned one, this warranty should take that doubt away.

The customer support is also top-notch and is offered without any additional charges.

Surprisingly, I could not find a single review that stated any faults about this product. That may be because it has not been bought very frequently to ensure it is a safe buy.
  • Meets OEM requirements
  • One-year warranty
  • Free technical support
  • New parts such as the nozzle and O-rings
  • Not enough reviews

I know this one is a bit of a risky buy. But it is far better than other options that claim to be the best and turn out to the worst of all when I tell you.

If it turns out to be advertised, you can rest assured that you will be gaining some serious fuel efficiency and performance.

5. Bostech Remanufactured Gold Series Fuel Injector

Bostech Remanufactured Gold Series Fuel Injector

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Coming in the fifth and final position is the gold series manufacturer by Bostech.

Now, I don’t know what these brands are naming the injectors for, but one thing is for sure, platinum is surely better than gold.

Don’t be fooled that that was the reason I chose DCP Injectors over Bostech. This reconditioned fuel injector is claimed to have been fully disassembled and then inspected.

It is made to look brand new to the point that if the brand wanted to sell them as new, they could. But honesty is one of the key factors to gaining lifetime customers.

All of the problems of these injectors are ironed out, and then all major components are replaced. The nozzle is changed so it does not spray too much or too little fuel into the engine.

The seals and O-rings are also replaced to make sure no contaminants enter the injector. Without the presence of such seals, it would clog up pretty quickly and become unusable.

After reassembly, the injector is tested under strict conditions to ensure no problems will be faced by the consumer.

Furthermore, the company also provides a three-year/100000-mile warranty. This is the longest warranty out of the bunch.

So, you can have peace of mind for three whole years that any fault will get you a no-cost replacement.

This one does not have any reviews to ensure that all claims of the manufacturer hold up. This makes this product a risky buy.

The brand also did not state anywhere that the injector has been tested against OEM specifications.

  • Three-year/100000-mile warranty
  • Fully disassembled and reassembled
  • New nozzle, seals, and O-rings
  • No confirmation of OEM required testing
  • No reviews

It has not been tested under OEM conditions, and no one has bought or at least reviewed this product yet. But it is better than other options on the market.

Frequently Asked Questions

Q1. How Long Do 7.3 Injectors Last? And How Do I Identify That They Have Gone Bad?

Now, these are two questions all vehicle owners should know, enthusiasts or not.

After years or decades of usage, it is very common for injectors to go wrong. You should expect it to cause problems for you as it is not made for such long-term usage.

There are many ways to identify a failing injector. But you can expect it to fail around the 200000-mile mark. You can identify failing injectors using the following ways.

One reason can be decreased fuel efficiency. The engine can also misfire. The reason for that is the injector sprays too much fuel into the engine.

Another reason for that can be it is clogged up with dirt.

Another way of identifying the issue is by checking your RPM needle. If it moves up and down erratically, then you have your answer. (Check this article on 7.3 Powerstroke problems).

But if you have these symptoms, it does not mean that you have a faulty confirmed injector. It is better to get it checked by a mechanic first, so you do not pay for a repair that is not needed.

Q2. What Size And Type Of Injectors Are Used In The 7.3 Powerstroke?

The 7.3 Powerstroke uses HEUI style injectors. It is an acronym for Hydraulically Actuated Electronic Controlled Unit Injection.

This is the latest and greatest when it comes to the world of injectors. They are electronically signaled.

The 7.3 Powerstroke was manufactured during the years 1994 till 2003. From 1994 to 1997, the injector was a 98cc AA unit with single shots.

From 1997 till 1999, the capacity was increased to 120cc, and the injector now throws split shots instead of one.

After that, and till the end of this engine’s production in 2003, the injectors had an AD code and a capacity of 140cc.

Q3. My New Injector Is Producing Smoke. What Does That Mean?

This depends on the type of smoke that is being emitted by the vehicle. If the smoke is blue, then that the oil is burning in the combustion chamber.

This happens when the O-rings fail and the oil enters the chamber with the fuel. So, if the smoke is grey or blue, then the problem is failing O-rings.

You can get separate O-rings on the market. Alliant Power makes excellent O-rings. You can buy those and never be worried about this problem ever again.

If the smoke being emitted is white, then the situation is much worse. This is because the diesel is entering the exhaust system without entering the combustion chamber at all.

This means that an injector was not installed properly or is faulty. Suppose it’s not the first option, then you may be in the warranty period.

If yes, then don’t hesitate to contact the brand and ask for a refund or replacement.

Moreover, if the smoke being produced is black, then there is only one reason for that, too much fuel in the combustion chamber.

You may notice that the smoke appears while accelerating, but that is common.

If it is seen during normal usage, then the injector has most definitely gone bad. It is spraying too much fuel into the engine.

Q4. If My Injectors Go Wrong, Can I Do Something To Fix Them Myself?

Now, who does not like to save a trip to the mechanic and some money doing that too?

Well, if nozzle or O-rings are damaged, then replacing them is an easy task.

Do you know why it is recommended to get the mechanic’s hands dirty instead of your own?

If not, then let me tell you!

Suppose you removed the injector, and during the part replacement process, you mess something up.

You are left with nothing, no spare injector, making your car utterly useless until you receive new ones.

A mechanic has experience in the field and can inspect and fix accordingly without breaking anything. That is why it is advised to spend some and go to a mechanic.


What are the reliable injectors for 7.3 Powerstroke? Let's find out

If you managed to read through this article then one thing must be set in mind that rebuilt injectors are just as good as new ones.

Not so fast there! There is a buying guide further along that states the pros and cons of both types of products.

I can assure you that there are no injectors better than the ones in this list of the best injectors for 7.3 Powerstroke.

If I had to choose one to recommend to you, I would suggest the Delphi EX63083AD Diesel Injector; no matter how inclined I am to recommend a new one.

It is extremely reliable and has no real drawback.