1st almera

hi all just a quick question hope some1 can help looking at buyin this almera and it has a vacuum gaugh so i asked him what it was reading at tick over and he said 30 and then it drops when u rev it. is this i sighn of a good/bad engine just iv read that between 16 - 22 is healthy and 14 - 20 is weak any help would b great ps it has had a full engine rebuild 30k ago but un sure of the parts that where replaced thx again
 
I have one fitted on mine.. Reads -20PSI on Idle and goes to 0 under full throttle..
Dosen't really mean shit IMO though..
Joe
 
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