How do I say this so that a baby can understand.

It was not modified by my choice. Is that english enough for you.
This is not your forum. You are not the boss of anything here.
I have asked a question to the starter of the thread not to you.
Im on many forums as well as u tube threads and everyone else is civil and speaks to the issue related, not the innuendo you spewing.

I wont reply your next attempt if you bother. I think you filled the fool cup plenty.

 

The forum is open to any member to respond even if you ask only one specifc member a question. You do understand that is how it works on social media platform like vehicle forums I hope?
You personally have no idea what I have to do in regard to this forum in any capacity except your assumptions.
For someone that claims to be on other forums you do realize you HI-Jacked this thread instead of starting your own thread about your questions and project.
I do believe you will respond you can't help yourself especially because if you are intelligent,(questionalble) you know what you are wanting to do is just universally a bad idea.
Now because of all this that you started by Hi-jacking another members thread a cleaning by way of moderation editing may be necessary?

 

Getting back to the original post you said "It has no existing issues or fault codes, and I decided to do a DPF delete to improve the fuel economy" so I question how you determined by deleting it it would improve economy? Yes they are very problematic on some cars but they do serve a purpose. Perhaps you did some research into their issues on Mazda vehicles.
The EGR is another thing. Yes they can block with carbon but their role is beneficial when cruising by reducing engine pumping losses and reducing peak combustion temperatures leading to improved engine life and reduced fuel consumption. Modern engines achieve the outcomes of the EGR with the use of VVT making it much harder for amateurs to play around with the system and eliminating the EGR issues assumed by many because of the problems cars had back in the 1970's. That's over 50 years ago.It's been a long time since then and like technology major improvements made. I fully agree with your comment abt returning it to it's original state and from my experience should be easy enough for the person that turned it off to turn it back on unless like many thought they know more than the manufacturer and adjusted other values in the program. Any good tuner should always keep a copy if the original BIN file in the odd chance they needed to return the car to OE specs.
I think get your money back then go to a Mazda dealer that can put the OE program back in and just enjoy the car for what it is.

 

Well stated Charles...

 

To use the tools used by many members on this forum often.... Lets see what the internet says for all those and many members that use the internet for a fast study or finding something that supports there personal thoughts and beliefs? The information although available from many sites all can be varied through empirically fact-based institution on the research and study of engines emission equipment, fuel formulas and much more to be more efficient and to lower the exhaust by-product of the use of specific fuels like diesel and gasoline.
Much of those are written for more technically educated individuals that are generally engineers.

Easy reading for most:

How EGR works in a Diesel Engine

The EGR system in a diesel engine works by recirculating exhaust gases back into the combustion chamber. This process helps to lower the combustion temperature, which in turn reduces the production of nitrogen oxides (NOx), a harmful pollutant. The EGR valve controls the flow of exhaust gases back into the intake manifold, and the EGR cooler cools the exhaust gases before they enter the intake system. This cooling is crucial because it helps maintain optimal engine temperatures and prevents knocking, which can damage the engine over time. The EGR system is essential for compliance with environmental regulations and for improving engine efficiency and longevity.


The Exhaust Gas Recirculation (EGR) system reduces nitrogen oxide (NOx) emissions by recirculating a portion of exhaust gases back into the engine's intake, lowering combustion temperatures.

Purpose of EGR

The primary function of the EGR system is to reduce harmful NOx emissions produced during combustion. NOx gases are formed when nitrogen and oxygen in the air react at high temperatures, typically above 2,500°F (1,370°C). By lowering the combustion temperature, the EGR system minimizes the formation of these pollutants, contributing to cleaner exhaust and compliance with environmental regulations.

Samarins.com+1

How EGR Works

1. Recirculation of Exhaust Gases: The EGR system captures a portion of the exhaust gases from the engine and routes them back into the intake manifold. This process dilutes the incoming air-fuel mixture with inert exhaust gases, which do not combust.
   
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2. Reduction of Oxygen: By introducing exhaust gases into the combustion chamber, the amount of oxygen available for combustion is reduced. This dilution effect lowers the peak combustion temperatures, which in turn decreases the formation of NOx.
   
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3. EGR Valve Operation: The EGR valve controls the flow of exhaust gases back into the intake. It can be either vacuum-operated or electronically controlled, depending on the vehicle's design. The valve is typically closed during engine startup and idle, gradually opening as the engine reaches optimal operating conditions.
   
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4. Cooling of Exhaust Gases: In some systems, exhaust gases pass through an EGR cooler before re-entering the intake. This cooling process further reduces the temperature of the gases, enhancing the effectiveness of the EGR system in lowering combustion temperatures.

Benefits of EGR

• Reduced Emissions: The primary benefit of the EGR system is the significant reduction in NOx emissions, which helps vehicles meet stringent environmental standards.
  
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• Improved Engine Efficiency: By managing combustion temperatures, the EGR system can also improve overall engine efficiency and performance, particularly in modern engines designed for lower emissions.
  
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  In summary, the EGR system plays a crucial role in modern internal combustion engines by recirculating exhaust gases to reduce NOx emissions and improve engine efficiency, making it an essential component in the fight against air pollution.

 

CG thought you weren’t going to post in this thread again. 😂

 

Hi Charles seems the thread starter was chased away.

However im also from SA and can provide some more depth as to why delete teh DPF. Not just about fuel economy.

First the DPF uses fuel to bing it up to active regen burning temperature. This is not fuel used to make the car move. I have seen my tank go from full to 3/4 in the matter of 30 minutes.

Thats besides the effort the engine uses to force gases out.

But ...the main reason for the delete is that in SA the diesel fuel has higher Sulphur 50ppm and our trucks use 500ppm as apposed to EU and UK standards of 10pp.
this creates much more soot and ashmeant for the DPF and reduces the life span.

Sometimes we have DPF failures as early as 50000 to 80000km but usually around the 150000km mark. And at 100000km the warranty plans expiers. So you end up with bills of 3000 to 6000 US dollars out of pocket for DPF replacement as opposed to 300 US for a delete.

I was interested in thread starter car idle after he removed the EGR. As mine is still in place but my car vibrates quite a lot with only a dpf delete
Im looking for something irregular so that I could take the car back and get my money back. Each time I took the car back the dealership was giving me a workaround. But if the IDLE is rough only because of a mistune and not because the EGR is in place then the dealership will just try to tune it again...this is my issue battling with

But ever since your comment about the EGR benifits in cooling the engine im more inclined to keep my EGR in place.

Thanks for the info

But after reading your comment about the benefit of the EGR cooling tve

 

Could you clarify as to why you got stuck with this scenario against your own doing.
If the dealer did not inform you of the condition before you purchased the vehicle or if the dealer did the deletes without your knowledge, and you can prove this in either or both cases they are liable.
If you knew of the condition and still purchased the vehicle or accepted the invoice if they deleted after the fact, then you are liable.

This is when you weigh your options, adding in legal fees, as to how to proceed.
Arguing with and/or disagreeing with forum members here will do nothing to resolve your situation.

As a former computer technician/service manager I can tell anyone who attempts to change any computer settings from the original ones voids all warranties no matter what computer system it is.
Do I overclock my gaming PC's for higher end performance, sure but it immediately voids any warranties applicable to the computer and its hardware/software and I have no EPA regulations to follow.
Yes, even with my full knowledge of computers it occasionally resulted in frying components which I had to pay for.
In other words, if you screw with the original settings on any manufactured product, it is on you, not the manufacturer.
You do so at your own risk, which is why you should never purchase anything that has been modified unless you want potential issue and expenses.

 

Lobstah the vehicle was purchased with no faults. A week later while driving it had a DPF malfunction.
The dealership took the vehicle back and had it for 3 weeks trying to repair it. Gave it back to me working and a week later another DPF malfunction. They took the vehicle back for another 3 weeks. And this continued for about 2 months. In the end they advised me the only way fwd was to do a delete. I complained to the compliance regulator but was advised it could take years before a resolution is given. The dealership made it clear they were not prepared to do much more than a delete and i was without vehicle.
So there you have it. I told them go ahead with the delete because I life to do.

 

Then by your own words the dealership is taking care of you. Nothing any forum can do except read your sad story?
I still thought you were not going to post here anymore? lol