The a/c vac line is cracked or broken. Look at the HVAC tree on the driver side fender near the firewall. It has lines running to, I believe, brake booster, interior HVAC controls, and I think p/s pump?? The a/c one is the middle one I believe. You can buy some hard line for like 10 bucks for 6' I believe from Advance. I just used heatshrink and fused together some lines to make it work.