These sorts of issues are why I'm such a strong advocate for ditching as much of the nanny systems as possible. These cars are nearly all 20 years old by now and the vacuum and electrical bits have degraded to the point that they're no longer reliable. Switching to a boost activated actuator and scaling the vacuum lines back to just the bare minimum makes these cars so much more of a joy to drive and maintain. I choose turbo diesels because they're powerful, efficient and simple. Why deviate from that successful formula?