EGR Delete & AdBlue Delete With DPF Still In-Place

[SlothBurger]

Hi.

Just wanted to confirm what the indie has done on my 2019 204 CXEB Kombi - the EGR has been blanked off and coded out and also AdBlue has been coded out. DPF is still in-place. Now I thought that AdBlue was needed for DPF but just want to confirm that DPF can still work without AdBlue?

 

[Sasquatch]

Adblue is completely independent of the DPF.

 

[SlothBurger]

Adblue is completely independent of the DPF.

Thank you that is comforting to hear. All good so & good riddance to EGR and AdBlue.

 

[Richard T6.1]

Is it remapped too? (as the EGR is out)

 

[SlothBurger]

Is it remapped too? (as the EGR is out)

That I am not sure. I was told "blanked and coded out". This was done as it kept getting fault codes. What remapping should I be asking for as it's going back in next week for a different job and they could do the remapping if not already done?

 

[Richard T6.1]

No expert here but as the EGR is not bleeding exhaust gas into the intake anymore, the combustion changes inevitably (and the temperature goes up). Normally the fuel trims need to be adapted for these changes. When I had the EGR removed from my BMW 320 diesel a few years ago, the mapping definitely needed to be adjusted as the changes in the mixture (without exhaust gases) and thus the combustion process, where far outside the 'self regulating range' of the ECU & sensors.

Not sure if this is the case with our VW diesels too but a few specialists I talked to here (Netherlands) said 'yes, it needs remapping too'. I've read this a lot on the German T forum as well btw. It makes perfect sense to me. Maybe worth checking out or wait for other members to chime in.