VAG EGR Questions

[TDIRyan]

I'm not sure what this is, but I Vag'd the car and

with the 32768, the EGR was at 85%, which from what I've read was right.

with the 33768, the EGR is at 40%, from what I've read, this should be about 4%. 33768 was the highest value it would accept (it has a RC2 and PP357 injectors with an auto tranny)

What could be wrong with this?

 

[GoFaster]

Nothing's wrong with it. There is no direct relationship between the duty cycle and the amount of EGR used, except that "less duty cycle = less EGR". You have been misled by the suggestion that there was such a direct relationship.

Take a look at the mg/stroke of intake air, instead. With a warm engine in neutral and major accessories off, with 32768 it's drawing in around 230 - 250 mg/stroke. With 33768 it should be around 350 - 380 mg/stroke. Drawing in more air means less room for EGR. When the EGR is off completely (after a minute or two at idle) it should go to 440 - 480 mg/stroke, which is what corresponds to no EGR at zero boost.

 

[BRIAN427COBRA]

Did'nt you get Euro tuning with your RC2, if so the EGR no workie.

 

[GoFaster]

Judging from the duty cycle being more than almost-zero, this one has the EGR working.

 

[TDIRyan]

I don't think Jeff did that with the Auto tranny coding when I got mine... I wish he did, it'd be a lot easier when it accidentally falls off one of these days.