Ha ha yeah "ancient" and "no experience" is me. But at least I'm not the average Ferrari owner and would just tow it in. Pantera guys are a bit different. I'm not ruling anything out as the cause, and even on the FPR Areomotive link above it says its normal for the FPR to not hold vacuum when testing at vacuum port with a hand held vacuum pump because its normal for some leakage to occur at the pressure adjustment screw threads. So I may try some silicone adhesive all around the top adjustment screw & test with a hand pump just out of curiosity. But maybe its normally built to lose pressure somewhere else on shut down, who knows, although that would seem odd where its going. Anyway to stinkin hot here in Southern Cal to do anything with it at this point. 90 in CA always feels like 115 not sure why. Going to get a spark plug wire tester and at least make sure my wire is ok tomorrow giving the neighbors a rest today.