Ihave looked at the vacum lines,when I went to remove them for inspection they snapped like uncooked spagetti. Some of the rubber hose ends were so wiped out I was able to see thru them.
I have replaced the plastic hoses and the rubber hose connection ends and it seems to run better hot.
Upon inspection of the fuel press regulator I can smell fuel in the vacum hose hooked to it. so I hooked up a long section of hose to it and pulled vacum you can get a slight smell and taste of fuel but no liquid should I replace the regulator???
Thanx John.........................