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Pros and cons of EGR delete
- Thread starter malcantry
- Start date
Outlawstar98
Member
- :
- 2003 MazdaSpeed Protege / 2013 BRZ
It's not good and it's not bad, it's a useless thing for emissions reasons. You get a CEL and that's about it.
2.0t03speed
Member
- :
- 08.5 CWP Speed 3
i have my egr removed. I have some stumble on cold starts but only when i dont give it enough gas the car idles perfectly. I attribute that more to my 505 mani then my egr not being there.
2.0t03speed
Member
- :
- 08.5 CWP Speed 3
hmm so what happens when i tell you it did the exact same thing 2 years ago when i had my egr hooked up?
i remember mine stalled out quite a bit when cold starting in sub 0 temps. enough to piss me off lol but if you are in warm climate it may not be bad at all. if its a DD I would say keep it, if its a track hoonigan than ditch the egr valve/pipe and enjoy the weight savings.
SeR_Cyclops
Member
- :
- Mazdaspeed Protege
You WILL have cold start up issues and the car will run leaner when it is cruising.
SeR_Cyclops
Member
- :
- Mazdaspeed Protege
i have my egr removed. I have some stumble on cold starts but only when i dont give it enough gas the car idles perfectly. I attribute that more to my 505 mani then my egr not being there.
This is because of the EGR gone. My car use to do the same thing, this summer I installed the EGR back like it should have been it fixed all of the cold start issues.
My rotting corpse of a P5 currently has a EGR plugged in, but not connected to the intake mani or exhaust stream.
Insufficient EGR flow is one of the recurring codes I am regularly chasing to cure my CELs and get past Massachusetts inspection.
EGR cleaning was my 1st ever DIY car project, almost 6 or 7 years ago. When the code showed up 3 or 4 years later, I got a new EGR from Mazdaspeed Motorsports and just swapped the plug and left it hanging open in the engine bay.
I wish I could understand how it even knows it's not seeing flow. According to one mechanic I previously visited, there isn't even anything in the EGR that can tell if there is or isn't any flow. It can only tell if it's open or closed and that's it. My hypothesis is that the ECU interprets the lack of any change in engine parameters when it is opening and closing the valve and throws an EGR code by default.
I own a 505 mani (black) with the EGR deleted and it's still in the shipping box. It was intended to go in along with the rest of my semi-complete turbo build.
I'm sure the years of running in a poor state of tune haven't helped with my oil burning (has a head swap) and CEL issues.
I recently replaced the 1st O2 sensor and TPS to cure those CELs, but the EGR issue remains a headache.
In other EGR news, my wife's '08 CX-7 with almost 58,000 miles is now occasionally throwing the EGR code too!
I'm planning to clean it and maybe even snake the EGR tube in case it's totally gummed up.
Insufficient EGR flow is one of the recurring codes I am regularly chasing to cure my CELs and get past Massachusetts inspection.
EGR cleaning was my 1st ever DIY car project, almost 6 or 7 years ago. When the code showed up 3 or 4 years later, I got a new EGR from Mazdaspeed Motorsports and just swapped the plug and left it hanging open in the engine bay.
I wish I could understand how it even knows it's not seeing flow. According to one mechanic I previously visited, there isn't even anything in the EGR that can tell if there is or isn't any flow. It can only tell if it's open or closed and that's it. My hypothesis is that the ECU interprets the lack of any change in engine parameters when it is opening and closing the valve and throws an EGR code by default.
I own a 505 mani (black) with the EGR deleted and it's still in the shipping box. It was intended to go in along with the rest of my semi-complete turbo build.
I'm sure the years of running in a poor state of tune haven't helped with my oil burning (has a head swap) and CEL issues.
I recently replaced the 1st O2 sensor and TPS to cure those CELs, but the EGR issue remains a headache.
In other EGR news, my wife's '08 CX-7 with almost 58,000 miles is now occasionally throwing the EGR code too!
I'm planning to clean it and maybe even snake the EGR tube in case it's totally gummed up.
Spiced MSP
Member
- :
- 2016 Peterbilt 579
how do they seem "fake". Go to his threads and look at the dyno sheet yourself or ask anyone who has one. Better yet, ask him yourself. I have one installed but Im waiting on my replacement wideband to come so I can tune my car again since installing it. Lots of time and thought went into making them, the initial design has been revised a couple of times for better performance and fitment. It speaks for itself and anyone with one will tell you the same thing. I have done two pulls with this manifold on and there is definitely a big difference over the stock or 626 manifold. Im not talking about some imaginary "butt dyno" result either. Im saying I was shocked at how the car pulled after installing it. Several others have had the same response. For it to just be a fake square box, it has to be doing something if it has nothing but positive feedback. and to top it all off, 2 well built protege owners have them on their cars, BrainMP5T to name one of them. So, looking at the amount of detail that went into Brian's p5, I highly doubt he would just throw some "square box" in his engine bay. By the way, Im not mad if this seems like it. Just making a point
Last edited:
whoa, i knew it was the wrong choice of words!
lol
i'm sorry, i didn't mean it to call it "FAKE" it was more like...very DYI-ish? i don't know how to put it....i hope you understand.
i see your point and i'm glad the part has so much support behind it.
i meant no disrespect
lol
i'm sorry, i didn't mean it to call it "FAKE" it was more like...very DYI-ish? i don't know how to put it....i hope you understand.
i see your point and i'm glad the part has so much support behind it.
i meant no disrespect
how do they seem "fake". Go to his threads and look at the dyno sheet yourself or ask anyone who has one. Better yet, ask him yourself. I have one installed but Im waiting on my replacement wideband to come so I can tune my car again since installing it. Lots of time and thought went into making them, the initial design has been revised a couple of times for better performance and fitment. It speaks for itself and anyone with one will tell you the same thing. I have done two pulls with this manifold on and there is definitely a big difference over the stock or 626 manifold. Im not talking about some imaginary "butt dyno" result either. Im saying I was shocked at how the car pulled after installing it. Several others have had the same response. For it to just be a fake square box, it has to be doing something if it has nothing but positive feedback. and to top it all off, 2 well built protege owners have them on their cars, BrainMP5T to name one of them. So, looking at the amount of detail that went into Brian's p5, I highly doubt he would just throw some "square box" in his engine bay. By the way, Im not mad if this seems like it. Just making a point
Spiced MSP
Member
- :
- 2016 Peterbilt 579
understood, like I said Im not mad or anything..lol. You should jump on the next group buy when progress starts being made again (drive2)
understood, like I said Im not mad or anything..lol. You should jump on the next group buy when progress starts being made again (drive2)
i would by with a baby in the way, i am doing as much DIY as i can for now.
Spiced MSP
Member
- :
- 2016 Peterbilt 579
true, congrats!!
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