Going to check ebay now

 

Fixed the white vacuum line which got rid of code 327 but still have code 328, EGR closed valve voltage lower than expected

 

I'm betting the rubber boots that attach line to different components, they stretch and crack.

 

Code 327 came back also

 

It doesn't take much of a vacuum leak to start throwing EGR codes. The EGR requires a lot of vacuum to function, it's constantly applying and releasing vacuum while driving. That's why when you get a small vacuum leak it's the first thing to throw a code. The electronics just verify the EGR valve is where it is supposed to be.

 

IDK where you're getting that. EGR doesn't use substantially more vacuum pressure or volume than secondary air (which has 2 modulated diaphragms). And it uses far less than HVAC or cruise control. If a code involving EGR is thrown first, it's only because that's where the problem is apparent - not because of a general vacuum problem.