Put a vacuum gauge on a "T" fitting between manifold and fuel press reg (so pressure reg still hooked up to vacuum line)/ Get a reading at warm idle of 6-10 inHg, which afaik is quite low??? expecting 15-22? needle fluctuates with idle speed +- 2-3 inHG. So maybe I have a vacuum leak somewhere? getting a check valve later so I can check each cylinder. Any comments appreciated! (note - compression good at 190 on all cylinders, valves just adjusted 2 days ago).