Hi there, I hope you are all well.

I have a question. I have a CX-5 2.2 2017 (pre-facelift) that has 212 000 km on it. It has no existing issues or fault codes, and I decided to do a DPF delete to improve the fuel economy and longevity of the car. DPF's are not required by law in South Africa, and only the imported models such as the CX-5 have them in. I got the car back from the mechanic, and was informed that they had also deleted the EGR from the ECU (not physically) despite my instructions, explicitly, not to do that. Now they are being difficult about restoring it on the ECU. My question is: Will the EGR delete cause problems for the car? I'm afraid that higher combustion temperatures might damage the engine. I don't believe that they remapped the combustion cycle to compensate. I think that they only deleted the EGR function.

Kind regards,
mZAda.

 

Welcome to the forum

You should have left the Mazda as is and NOT tried to remove alter or change operating systems. The very small amount you may have gained in power and MPG is not worth what will not cost to bring your Mazda back to spec.

Sometimes unless YOU are the expert at ECU calibration and tuning for better performance and have the experience and training not to mention the investment in several thousand dollars in tools and equipment needed to be your own Auto technician it is better to LEAVE THINGS ALONG.

The other problem is that lets say you do get it worked out... what happens later when you have issues and you need to go to a shop for service. That shop is not likely to have a cluse how to fix your Mazda

 

I suggest you research the purpouse and benefits of the EGR system and deleting them will actually cause an increase in fuel consumption and engine temperature.

 

Hi sorry to see you get such bad responses. Some people should rather keep quiet and not respond if their only aim is to be unhelpful. You are not the first person to do the delete.
im interested on when you done the delete and hiw its affecting your vehicle now later on. I started getting many DPF malfuctions and was advised that a delete will cost me less in the long run.
Which delete did you do at the filter ? Was it a straight pipe or did they just clean out the soot trap material?

Does you car vibrate more at idle?
and check oil. Does it stay the same or rising on its own?

 

Regarding EGR delete..

Dude we all share the air we breath, so asking how to pollute it be removing parts designed to reduce pollution is not only humanly wrong but you will end up with a vehicle that will be plagued with issues. Unless your going to purchase an ECU program and either pay an expensive and experienced EFI/ECU Calabrator or try it yourself and make things worse then they are after removing parts monitored by you ECU. Your ECU I/M monitors will never be in status ready or a phrase you would better understand “ in functional working order”. Deleting an EGR system will negatively affect ECU operation. The ECU will activate the check engine light with several different DTCs as well you will have one or more that will be permanently in your ECU file history event counters. They will remain in counter history for access view showing how long a DTC was not corrected. In some countries you could be violating laws or regulations. In the USA it can go as far as a felony to remove the EGR .

So really when you join a forum my advise is not to discredit posted information from some meters , before at least looking into if they may actually know something or not?

my advise don’t do it you will regret it at some point

 

Callisto we are not all doing mods for the same reasons. I purchased the 2nd hand vehicle recently and the dealership did everything in their power to do the delete because they didnt want to spend any further funds on it. I got stuck with this scenario against my own doing and am trying to figure a few faults so that I can send it back and ask them to reimburse me. So no need for the Moral lecture im here looking for mechanical knowledge.
further more priority dervice vehicles like Ambulance and Tanks do not have DPF systems because you cannot have a tank go into limp mode in war, or an ambulance going into limp mode picking up a dying patient. NO MATER WHAT COUNTRY!!! There are many service vehicles like this that do not fall under the green moral banner.

I have further went onto many other threads with people doing the deletes with no issues. From what I read it depends on how it tuned it in the ECU.

Im looking for something thats out of the norm to get my money back. So relax your slacks

 

No I don't care for vehcle owners like yourself you give true "modders" a bad name and reputation on the social media in general with various global topics.
First if those other threads did the BS service, then why not go follow there grand advise. I guarantee not one of them has the experience or certification I do in the Automotive industry!
I really LMAO that you call what you are calling a "mod". The term MOD was a term used for those that were primarily were upgrading their vehcle to a performance level or looks, NOT tearing it down to by-pass system designed to control the air quality out the exhaust system instead spending the time and needed money to do a service correctly. In your case to cause harm to the vehicles designed system and the environment we all share using it as a daily driver or to cheat the next person buying your car not aware of what you Frankenstein to it..
You confuse those that simply do whatever they want with total disregard for what happens to things that effects the majority.
Look dude I did Emission testing for over a decade and found "CHEATERS" seem to fit a group I place together as dumb **** individuals that could have save more money to fix issue instead of by-passing engineered and design systems that were meant for a mas produced daily driver. Comparing a military use vehcle is another example of stupidness having to do with vehcle not understanding the difference between a high production vehcle meant for the public and a limit use vehicle design for the military?

If you want to Track or off road your vehicle I can understand it but really don't expect those that know better to support or suggest how to bypass Emission system that will affect not only the complete outcome in a negative way on your engine but places the reputation of a good forum like this at risk of being categized and one that members give bad information that in the end results in a negative outcome. Unless the intended was to build an off road vehcle for track use. And in your case better shop for a ECU "tooner"!
You totally disregarded what I mentioned about your ECU and good luck with that. LOL

 

C.G

Junior Member

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• About C.G Country of Residences ZA(South Africa)

Well well this ^^^^^^^ explains why you don't give a crap about what you do to your vehcle and its effect on others globally regarding increasing the pollutant level of your Mazda! Hope you don't get caught in your country with your project in the near future from these article I read and a few more on the topic! For now looks like you can basically get away with it?

South Africa's Emission Laws

South Africa has implemented a 10.6% increase in emission taxes for passenger vehicles as of April 1, 2024, raising the rate from R132 to R146 per gram of CO2 emissions per kilometer. This tax applies to vehicles emitting more than 95 g/km of CO₂, with double-cab bakkies taxed at 175 g/km. The goal of these emissions taxes is to influence the composition of South Africa's vehicle fleet to become more energy efficient and environmentally friendly. The tax is added to the vehicle's purchase price, impacting the cost borne by consumers. The formula to calculate the CO2 levy varies depending on the type of vehicle, and the rise in emission taxes is expected to significantly influence vehicle pricing strategies.




South Africa needs to accelerate the adoption of stricter vehicle emission standards

 

Callisto you a fool bra. The more you speak the more incompetent you sound. I just told you im trying to get the car back to teb dealership because I dont want it as is. You dont seem to understand English.

 

I understand clearly "bra" you are modifying a system that should not be modified 'bra'! If it were so simple as returning to the dealer then you should return it in the state it is and let the dealership service the Mazda properly.... "bra".
The fact that you are continuing to respond is an indication you know exactly what I am say is correct (or you are just not the brightest bulb in the box) and you just wanted to a How-To that is not good service advise or recommended. "bra'!

The Engsh definition for incompetent is the incorrect word to use in your contents. I do understand English words meaning. "bra'.
BTW "bra" is

1. an undergarment worn by women to support the breasts:
   "it's important to choose a bra that provides the correct support"
   "she modelled a light blue bra"
2. NORTH AMERICAN ENGLISH
   a carbon-based cover that fits over the front bumper of a car:
   "there's even a car bra so you won't be picking bugs out of the grille when you arrive!"

ROLMAO
__________________________________________________ _______________
incompetent
not competent; lacking qualification or ability; incapable.
an incompetent candidate.
Synonyms:unfit, inadequate, unqualified

Let me give only a single example of my qualification
Read the signature it in English