1990 Mazda RX7 wont stay running

Engine Performance problem
1990 Mazda RX7 Two Wheel Drive Manual 150000 miles

I have a 1990 rx7 convertible it will start up but wont stay running I have so far found that it doesnt feel like their is any vacuum going to the choke but have checked all hoses no leaks their is what looks like a throttle controlled vacuum cylinder and it feels like the line is froze but the car will stay running if I hold starter on can you help or tell me what I can narrow ir down to or tell me where I can get a vacuum hoses routing guide so I can make sure they are all ran right anything would be helpful thanks