Hi all,

 

Been having having a few issues with the VRS since I bought it. First thing I noticed it will go into limp mode if in 6th gear on the motorway at cruising speed when putting my foot down for a hill or increasing speeds. This is combined with the P0299 error code (underboost). My initial reaction was that it was the sticky turbo vanes, and sourced all the stuff needed to do the Mr.Muscle trick, only to find I had the EGR cooler so decided to hold back doing it till after work has calmed down at uni.

 

The second code I occasionally get is the P0401 (EGR flow insufficient). This caused an EML the other day, but no limp mode. I didn't manage to get the EGR off last time (couldn't get to the bolts underneath), however it looked fairly clean inside. 

 

I've done so research on these two codes on the site, and the sticky vanes seems to cause the turbo to overboost and not underboost as I am getting. And with the EGR being fairly clean it shouldn't fail to give the error. This makes me think it could be the vacuum controller. Am I right in thinking this is the N75, with about 6 pipes coming off it in the top left of the engine bay? I have circled what I think it is, but could someone please confirm? I am tempted to replace it to see if it fixes the issues before taking everything apart. 

 

Check the EGR valve is actually working, vacuum leaks are common and the valve may well be stuck shut.