Any ideas why an 07 A3 with APR for a few months is no longer boosting hard? Think he might just have it stuck on stock setting? haha or do you think check valve or DV is going already? Any input would be nice, I'll post more info soon.

 

Definitely could be the DV. I would check all of the vacuum connections, especially around the brake booster if he has a boost gauge, since that connection seems tocome loose on my car. My money is on the DV.

Cheers!

 

ty chef