Heh, I own two 1990's so I suspect that although the top of the booster looked reasonably new on both of them, they're probably the original that was in there from factory as they're both genuine Nissan ones. Appreciate it! I'll keep it in mind just in case Will also check this too, got a lot of things to do with this Z.
Thanks! Couldn't have done it without everyone's help and great suggestions, especially yours, love the mityvac! I took it one step further and also tested the check valves to see if either of them were faulty also! Next steps; order some new hose and new booster and in the mean time replace the rotors once they arrive until the new booster arrives also! Cheers for everyone's help!
