Buying an audi a3 1.6tdi

[faz777]

Hmm that's odd lol Eco driving clogs up the egr. I drive sensible. But I do dual carriageway driving 5 days a week so that should make sure it doesn't clog up etc. hopefully

[Crasher]

90K miles of Eco driving did this to a 1.9 TDI T5 van which is the same engine.

Inlet manifold behind EGR valve



EGR valve



V157 flap BEFORE the EGR valve



Alkaline dipped inlet manifold and EGR cooler, painted inlet manifold, new EGR valve and V157 flap unit

[Passatier3]

Bit of a nonsense isn't it when Audi etc. bring out smaller diesels to give greater efficiency/mpg. and when owners drive in a manner to make the greatest use of it they get problems!

Is it with the TT tdI that when the DPF regenerates that fuel gets dumped into the system so effectively reducing the overall mpg?

You have to wonder sometimes at the direction manufacturers are being forced in to comply with emissions/greater efficiency regulations. Results when completing the required tests and in the short-term may be OK but in the real world/longer term the solutions/designs aren't looking too clever and fail to deliver.

[Crasher]

Any TDI with a non SCR DPF (non additive system) dumps fuel in to fry the particles. As you rightly point out, manufacturers are being forced down these routes by government (mainly the EU) that have reduced certain emissions which MAY harm the climate (CO2) but with a massive increase in emissions (PM<10 and the real little beauty, PM<2.5) that DO kill!

[alankru]

(PM<10 and the real little beauty, PM<2.5) that DO kill!

Pardon my ignorance Crasher, but what do you mean by "PM"; what emission is this?

[kite]

PM= particulate matter.

[Passatier3]

Any TDI with a non SCR DPF (non additive system) dumps fuel in to fry the particles. As you rightly point out, manufacturers are being forced down these routes by government (mainly the EU) that have reduced certain emissions which MAY harm the climate (CO2) but with a massive increase in emissions (PM<10 and the real little beauty, PM<2.5) that DO kill!

Those guys really want to take a step back and look at the bigger picture rather than thinking they are clever because they have succeeded in getting some legislation passed that only "improves" a small part of the equation. And sometimes to the detriment of what they are purporting to achieve when viewed as a whole.

Take AdBlue for instance which is having to be introduced by some manufacturers. Of course it's manufacture doesn't have a carbon footprint does it! Of which no account is taken when manufacturers vehicles undergo testing for emissions and mpg.

[Crasher]

You could say that AdBlue is taking the urea......