Great! I'd never tried this as I'd thought it didn't apply to PD engines.
I followed the instructions on my remapped PD130 ASZ engine using 409.1 and ebay cable and it worked exactly as said (220 mg/h before and 330mg/h after). You can actually hear the engine tone change ever so slightly when you switch the value.
The only strange thing was that the first time I pressed test with the new value the save button was still grayed out.. Lippo.. is this what you mean about not sure if you saved it? I exited and went back in and repeated the process and the save button was now available, so I wrote the value. I turned the engine off and on again and read the value back to make sure it was saved.. which it was.
Just curious but are these adjustments not the wrong way ?
Everyone is quoting figures in mg/strk
If this is how much exhaust gas is passed per stroke then surely the lower the better ??
IE - 220mg/strk would be better than 330mg/strk !!!
Or am i reading this all wrong ?
Hi.
The measurement is the Mass Air Flow reading.
When the EGR valve opens, less air passes through the airflow meter, thus the lower reading. The less the EGR valve is open, the more air passes through the airflow meter.
This is how the ECU measures EGR flow, via the airflow meter, as the EGR valve on the PD engine is a purely mechanical device. It has no potentiometer on it so the ECU can't physically see how much it is open.
Hope this helps.
Just curious but are these adjustments not the wrong way ?
Everyone is quoting figures in mg/strk
If this is how much exhaust gas is passed per stroke then surely the lower the better ??
IE - 220mg/strk would be better than 330mg/strk !!!
Or am i reading this all wrong ?
If I understand it correctly (which I don't so I'm just guessing) it is reducing the amount of exhaust gases that get fed back into the engine, so I assume the reading will go up if the gases are not recirculated to burn them out.
I have just done this to my 150 PD Leon 55 plate today. Reading about 355 mg/strk at idle now.
With reference to the above comment by george130, have you had any probs with the car that were related to turning it down? Turbo ok? MPG any different? Any EML come on?
I can't say I noticed a great deal in driveability. Turbo is definately more quiet when boosting at lower revs. Although you can still hear it quite nicely.
Would an eml show on an 07 pd130 with this adjustment?
Yeah that's it. I read it somewhere that the cheapo cable and 409.1 was not able to save the adjustment. I did it a couple of times - I don't remember if I was able to save the new value. I'll dig out the cable and check tomorrow.
I'll check mine later to make sure it has stuck. Pretty sure it has.
I think I'm being naughty with my vag-com version. crack applied.