vacumtrouble 930
 

got a vacumproblem on my 78-930.
when idling up to 4-6000rpm and shift gear, the engine keep the same rpm for a good second before it slowly drops.
think it must be a vacumproblem..!
any suggestions, or anyone who know where to download a vacum diagram for these old 930s?

I would kindly suggest that you have your distributor's vacuum cannisters checked as they are failure prone and that can cause your symptoms.

The factory manuals contain all vacuum hose routing information you need so you can check for any leaks.

There is often a vacuum diagram sticker under the tail . . .