1983 380 sl has a bit of a miss at idle found multiple vaccum leaks and disconnected vacc lines which I repaired according to Alldata vaccum diagrams...now idle is around 1500 at park position and has no torque on acceleration untill higher rpm still not what I think it should be ... is anyone able to shed light on this.. If this were a small block chev I would say that the secondarys are opening too quickly and bogging the engine , the timing has been checked and confirmed

Thanks Jay