EGR P0401 insufficient flow after flashing Base US93/EU98 map

Discussion of tuning specific to MAZDASPEED6/MAZDASPEED Atenza/Mazda 6 MPS vehicles
Maxl
Posts: 10
Joined: January 8th, 2021, 1:05 pm
Location: Germany

Re: EGR P0401 insufficient flow after flashing Base US93/EU98 map

Post by Maxl »

Hi,
I don't know why but it is like it is. When I remove versatune than it's like I wrote above. It's not a problem but I would like to know why it's like that :-D
mituc
VersaTuner guru
Posts: 1236
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: EGR P0401 insufficient flow after flashing Base US93/EU98 map

Post by mituc »

Ok, please load this logging preset: https://www.dropbox.com/s/4sru1ehbdb851 ... vtpre?dl=0
...and take logs when starting the car (so start the logging before starting the engine) and let the car idle for 2-3 minutes and log all this.
Repeat this with versatuner on (also let me know what tune you put on) and with the car fully returned to stock.
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~509BHP @34PSI
2008 Icy Blue Mazda CX7
Stock engine and exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 330-ish BHP
Maxl
Posts: 10
Joined: January 8th, 2021, 1:05 pm
Location: Germany

Re: EGR P0401 insufficient flow after flashing Base US93/EU98 map

Post by Maxl »

Hey,

Okay I will do this. But I have to wait until it's a little bit warmer outside. At Winter temperatures the Coldstart RPM are in general lower.

Greets
mituc
VersaTuner guru
Posts: 1236
Joined: December 17th, 2011, 2:47 pm
Location: Iasi/Romania

Re: EGR P0401 insufficient flow after flashing Base US93/EU98 map

Post by mituc »

Maxl wrote: January 26th, 2023, 7:21 am At Winter temperatures the Coldstart RPM are in general lower.
I see, so you may indeed have to clean the throttle body...
2008 Cosmic Blue Mazda 3MPS
Built engine + WMI + GTX3071 gen2, ~509BHP @34PSI
2008 Icy Blue Mazda CX7
Stock engine and exhaust (YES!!), JBR3" + GTX2867 gen2 + Autotech HPFP, self-tuned to 330-ish BHP
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