[jonhagg70]

I also have an 08 beetle that at idle surges and trust to die. Can't figure it out. I have replaced the valve cover gasket and rebuilt the vaccum pump. Any help would be great thank you

 

[billymade]

I assume, you have the 2.5L engine; the PCV diaphragm, is a common failure and we have also seen, a vacuum leak, from a cracked plastic hose/pipe, from the brake booster.

re: 2.5L PCV valve failure solutions from Dorman!

re: 2.5L PCV valve failure solutions from Dorman! The 2.5L; has a common issue, where the PCV valve fails. Up until now the only option; was to buy a whole new valve cover from Volkswagen (VW doesn't sell the PCV separately); at $225 or more, plus install... it is a pretty expensive fix with...

www.newbeetle.org

Using a scan tool, check your live data and see, what the fuel trims are, that can confirm, a fuel delivery or vacuum leak issue.

Fuel Trim Info - Ross-Tech Wiki

wiki.ross-tech.com

Please, post any trouble codes; that you are currently getting. Thanks.