I've got a 300 series Disco with 3.9 V8EFi, the vac advance on the dizzy has two outlet spigots, one has a pipe to the plenum, the other nothing! Can anybody tell me where the plumbing should go to?:doh:
I have my dizzy in my han d and so just experimented for you.. if the little black cap is mising then the vac advace won't work as it just sucks in air from that side.