Volkswagen under investigation over illegal software that masks pollution

[Greg Roles]

I don't think you guys have the concepts of a modern CRD pinned down. Power wouldn't be the worrying factor, i would be more concerned with being able to achieve the same fuel consumption post fix. But they are saying it has been achieved and i'm sure if that is untrue we will be seeing you all on today tonight again.

Hooray for some sense in a sea of postulation. Dead easy to add power and further refine economy over the stock ECU tune, the aftermarket tuning industry survives on that fact. The addition of a MAF screen on the 1.6 suggests a refinement of fuel metering, no doubt to achieve fuel economy. I run 130kw and over 400nm on dead stock fuel economy, so as if VW would struggle if need be. Lot of ceiling left in the stock tunes.

My bet is on more EGR, and more frequent DPF burns, both much more difficult to observe and measure, and of those I expect the software patch to mainly be a more aggressive EGR map, and a refined NOX burn map.

Increased need for a catch can and or inlet foam cleaning if anything.

[ParaBul]

Hooray for some sense in a sea of postulation. Dead easy to add power and further refine economy over the stock ECU tune, the aftermarket tuning industry survives on that fact. The addition of a MAF screen on the 1.6 suggests a refinement of fuel metering, no doubt to achieve fuel economy. I run 130kw and over 400nm on dead stock fuel economy, so as if VW would struggle if need be. Lot of ceiling left in the stock tunes.

How does it perform in the standard laboratory emissions test?

My bet is on more EGR, and more frequent DPF burns, both much more difficult to observe and measure, and of those I expect the software patch to mainly be a more aggressive EGR map, and a refined NOX burn map.

Increased need for a catch can and or inlet foam cleaning if anything.

I agree 100%. I think more EGR will cause more clogging of the DPF, hence burns will be required more frequently. In only notice mine doing a burn if I turn the car off before it's finished - the engine fan continues to run (well, I think that's it - it doesn't seem temperature / load related).

I have an OBDII Bluetooth dongle and Torque Pro - when I monitor EGR, it shows 40% at idle. I was surprised to see it registering anything at idle, much less 40% - I'm wondering if the EGR PID is working properly on the Golf (seems to work OK on my Japanese 4wd, also diesel, but probably not complied to the same emissions standard). Has anybody else monitored EGR% on one of these VW diesels?