Your control pressure looks like a warmed up value. Is that value cold, with electrical disconnected? Two bar would be more appropriate cold.

The vacuum acceleration enrichment might not be testable the way you are doing it. It also only functions during early cold running. During running the two ports both receive vacuum only one comes through an oriface. On acceleration one side drops instantly while the other takes a brief moment. During that brief moment there is a 1.2 bar drop in control pressure. That moment is only a second or so. No constant throttle situation is benefited by this change of pressure.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician