6.4 Powerstroke Delete Kit Reviews and Problems In 2023 [+How to Fix Them]

Here, we’ll review a 6.4 Powerstroke delete kit and problems you might encounter after deleting the emission system.

Problems with a delete kit are pretty rare, considering that most people get rid of the system and never look back. Still, issues with a deleted truck are not unheard of.

Below, we’ll take a look at some of these problems and how you could fix them on your own.

And to make things even better, we’ve searched the internet for the perfect delete kit for the 6.4 Powerstroke engine.


6.4 Powerstroke Delete Kit Problems

Modifying your vehicle can come at a risk, and sometimes these problems can be pretty expensive to fix. So, here’s a list of issues you could have after deleting the emission system:

Engine Knocking

Imagine going down the road only to realize that the engine is making weird noises. Well, that’s the engine letting you know there’s something fishy going on under the hood.

And while we could go on and off about all the possible culprits behind this problem, you might want to blame your EGR delete kit.

Installing an EGR kit can make your engine run rough, causing the engine to start knocking when the vehicle is in motion.

To fix this problem, you have to get rid of the EGR kit and then retune the engine’s computer to read the EGR.

Power Loss

Noticed a decrease in power after deleting the EGR on your vehicle? Well, that could be your problem.

You see, older diesel engines had a significant design flaw, which allowed them to benefit from an EGT delete kit. This, typically, resulted in more horsepower.

However, newer diesel vehicles don’t benefit as much from a delete kit.

That means that your horsepower could drop. So, to get rid of that problem, you have to put everything back on like it was before.

Broken Universal Joints

As much as we love speed, some tuners add too much power for the average Joe.

To delete the emission system, you must tune the engine. This means that your tuner will increase your horsepower.

And as weird as it might sound, adding too much power can mess up lots of things in your vehicle.

For instance, we’ve seen a couple of drivers claim that the universal joints stopped working due to the increase in power.

Problems You Will Face After Deleting the Emission System

One of the most widespread problems with deleting the mission system is that it voids your warranty.

That said, here’s more info about the 6.4 Powerstroke delete kit and problems:

It Breaks the Law

Many drivers are unaware that deleting the emission system is considered a federal crime.

As much as you might hate it, this system was put into place so that toxic pollutants wouldn’t come out of the vehicle.

Therefore, the removal of this equipment is illegal in most places. Of course, this is no mandatory in some places.

So, you have to do a little bit of research before you start working on your truck.

Some cops might pull you over and never realize that you’ve committed a federal crime, while others know their stuff and can give you a ticket for breaking the law. If you delete your emission system, do it at your own risk.

Voids the Warranty

As we said, you will lose your warranty the moment you delete the emission system. Sure, some dealers couldn’t care less.

But in most cases, they do. And if your car ever fails, you’re on your own. The dealer won’t take care of that.

Requires Special Programming

Deleting the DPF is a major chore, and some drivers don’t know is that they must reprogram the engine’s computer for the vehicle to work.

This process takes a lot of work and special software. If you don’t know anything about that, you’ll have to get in touch with your dealer.

Greatly Increases Particulate Emissions

Removing your emission comes at a great cost: it significantly increases the toxic air pollutants going into the environment.

This is a little bit of a hot topic for some people. On one side, you’ve got people that question the reliability of this system to protect the environment and humans.

On the other end of the spectrum, you’ve got people that would never delete the emission system as it goes against their morals.

At the end of the day, it’s up to you whether it’s worth all this trouble.

Best 6.4 Powerstroke Delete Kit Review in 2021

These days, it seems like delete kits are becoming popular. Well, that’s because drivers hate being held back by stock parts.

So, you need the best EGR delete kit for 6.4 Powerstroke, which is the Mishimoto brand.



Protects the Oil Cooler

Oil cooling is used to cool down high-performance engines. However, the oil cooler takes care of that behind the scenes.

As you would expect, the oil cooler plays a huge role in the 6.4 Powerstroke. Without it, the engine would overheat in a matter of seconds.

Unfortunately, the oil cooler clogs up from time to time. In doing so, the engine becomes vulnerable.

To avoid further damage, the oil cooler must be cleaned or replaced.

Installing a coolant filter system would take care of that as it screens out dirty particles from your car’s coolant, extending the life of the oil cooler and car.

Extends the Lifespan of the Water Pump

As you might know, the water pump flows the coolant through your car’s coolant passages.

However, if the coolant got contaminated during this process, your water pump could get damaged.

And when that happens, you’ll notice a puddle of coolant underneath the vehicle.

Like the oil cooler, installing a coolant filter system will eliminate all the solid particles, allowing the water pump to live a much more healthy life.

EGR Delete

There’s a little bit of controversy about whether you’d benefit from installing a coolant filter system after removing the EGR.

And the answer is yes. You would still benefit from getting a coolant filter for your vehicle.

It’s a Must for the 6.4 Powerstroke

The 6.4 Powerstroke uses a sand-casted block, and during the casting process, it’s pretty common for toxic pollutants to get inside the motor.

And as time goes by, the sand will come loose and begin to flow into other places, causing terrible blockages.

This has been an ongoing issue for the 6.4 Powerstroke and previous generations. And as such, getting a coolant filter kit is a must for this engine.

Keeps the Engine Healthy

As we noted before, the coolant filter kit is a simple method to protect both your water pump and oil cooler.

Without them, your vehicle would have a hard time going down the road.

Worst-case scenario, you’ll blow up the engine driving with a damaged water pump or oil cooler

So, by installing this kit, you would decrease the odds of failure.

It’s Cheap

Never has it been this easy to protect your engine with a simple and affordable kit. Seriously, this kit from Mishimoto is on the budget side of things.

Considering how much you get from this kit, we’d say it’s worth the money.

At the end of the day, it’s way cheaper than rebuilding or replacing a damaged engine.

DIY Guide: How to Delete EGR on the 6.4 Powerstroke

We know pretty well how hard it is to learn how to install EGR delete kit 6.4 Powerstroke. But we’ve done our best to simplify this process so you could quickly get this job done.

1. Disconnect the Battery

To start, disconnect the negative terminal, and then the positive one. Do not skip this step if you want to avoid accidents.

2. Drain the Coolant

After disconnecting the battery, drain the coolant from the plug located underneath the radiator on the driver’s side. Before pulling the plug, place a bucket underneath.

3. Take off the 3/8-inch Hose

There’s a hose going over the degas bottle. To delete the EGR, you must remove this hose. Keep it around. We’ll need it later on.

4. Remove the Upper Radiator Hose & Driver side Battery

Pull out the upper radiator hose. To do this, please pop the wire clip, and then you should be able to remove the hose right away. Once that’s done, remove the driver’s side battery.

5. Remove the Hoses & Vent Line

Here, you want to remove the coolant hoses going into the degas bottle. From there, remove the vent line on the battery tray. Next up, remove both the battery tray and degas bottle.

6. Loosen the Hose Clamp

Go to the driver’s side and then loosen the clamp on the intercooler tube. You do not have to remove this tube. Instead, separate it from the rubber boot.

7. Unplug the Electrical Connector & Coolant Lines

There’s an electrical wire on top of the EGR cooler, which you have to unplug. With that out of the way, take off the coolant lines on the vertical EGR cooler.

Now remove all the nuts and bolts holding the coolers. Next up, disconnect the mounting clamps. Finally, separate the coolers.

8. Release the Cooler & Remove the Plastic Coolant Tube

First and foremost, hold the intercooler tightly. When doing this, move the vertical EGR cooler back and forth. By doing this, you should be able to pull it out.

Once that’s done, take off the plastic coolant tube. Be careful when doing this, as you might break it apart. Do not throw it away. You’ll need it later on.

9. Pull the Upper Radiator Hose & EGR Cooler

Head over to the thermostat housing and then remove the upper radiator hose from it. After that, remove the upper EGR cooler. After removing it, keep the stud around.

10. Remove the Steering Shaft & Clamps from the Lower EGR Cooler

After removing the upper radiator and EGR cooler, take off the steering shaft bolt. Once that’s done, remove the stem from the steering box shaft.

After that, find the nut holding the dipstick tube together and remove it. Next, take off all the clamps on the lower EGR cooler

11. Remove the Coolant Line from the EGR Cooler

Here, you have to remove the coolant line from the EGR cooler. If you can’t get it off, feel free to cut it off as we won’t need it later on.

Having done that, find the EGR cooler’s rear angle, and then remove all the bolts holding it together. With that out of the way, remove the EGR cooler.

12. Remove the Bolts on the Lower EGR Cooler

Remove the bolts on the lower EGR cooler mount. To do this, find the line going to the lower EGR cooler and then remove the bolts. After that, the line should come off.

13. Install the New Bolts & Exhaust Block Off

With the bolts removed, install the new bolts in your exhaust manifold. When doing this, please torque them to factory specifications.

Otherwise, you could run into some problems. That said, install your exhaust block off. Finally, put the dipstick tube back on.

14. Install the new Coolant Plug

Notice that there’s a coolant tube going from the vertical EGR cooler to your car’s engine. You must remove this tube and replace it with your new coolant plug.

15. Reinstall Stud & Plastic Coolant Tube

Now reinstall the stud and plastic coolant tube. Remember, be careful when handling this tube as you might break it.

16. Reconnect the Steering Shaft

Remember the steering shaft you took off before? Well, now put it back on, and then torque it according to factory specifications. After that, install the battery box and degas bottle.

With that out of the way, reconnect the coolant lines going into the degas bottle. After that, reconnect the vent line which goes on the battery box.

17. Plug Back the Intercooler Tube & Upper Radiator Hose

Before reconnecting the intercooler tube, clean the silicone boot and intercooler tube using glass cleaner. After that, reconnect the upper radiator hose.

18. Disconnect the Wire Connectors

Now disconnect the cables on the EGR valve. Once that’s done, find the intercooler plumbing and then remove all the bolts and loosen the hose clamps holding the EGR valve.

19. Install the Intake Elbow

Grab your intake elbow and try to squeeze it into the boot. After that, secure the angle to the intake manifold.

20. Use the 3/8-inch Hose

Remember the 3/8-inch hose you took off? Well, now you want to use it to reconnect the coolant line that goes over the radiator to the degas bottle.

However, this time, you have to cut it off so that it can fit in.

21. Secure the Coolant

After installing the coolant line, secure it using hose clamps. After that, refill the coolant according to factory specifications.

And finally, run the engine to make sure everything went well, and you’re pretty much done.

This job takes about 6 hours to complete. So, feel free to take as much time as needed. If you got lost anywhere in the process, please check out this awesome video:

Frequently Asked Questions (FAQs)

If you still have any questions about deleting your emission system, make sure to check this out:

Is a deleted 6.4 Powerstroke reliable?

Yes! A deleted 6.4 Powerstroke engine is reliable. In fact, after deleting the emission system, you should notice an increase in power and gas mileage.

As you might know, the emission system is pretty restrictive and decreases your engine efficiency.

Does DPF Delete increase horsepower?

Yes, taking off the DPF increases horsepower. The DPF is pretty restrictive and robs you of some horsepower.

But before deleting this part of your car, keep in mind that the engine’s computer must be reprogrammed.

Are EGR delete good or bad?

EPA regulations make it hard for those truck owners who want to get the most out of their trucks.

In response to those regulations, many truck owners have replaced the EGR to increase horsepower, reduce engine temperature, and increase gas mileage.

Will EGR delete pass inspection?

No, you won’t pass the emission test if you delete the EGR. Sure, some cops might never notice that you deleted the emission system since not everybody knows what a deleted system looks like.

Still, it’s pretty risky if you don’t know what you’re doing.


Engine knocking is one of the most nerve-racking and common 6.4 Powerstroke delete kit and problems.

Many drivers have experienced that knocking feeling after deleting the emission system.

But as we said before, these problems are not as common if you know what you’re doing.

And in many cases, the problem is unrelated. So, there’s nothing to worry about when getting an emission delete kit.

And if you get the one we reviewed, your truck will run like a charm.

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