I usually just bypass the vacuum line all together and put it directly into the throttle body. Just do little amounts at a time or you'll choke the Jeep out. Also be ready for a cloud of smoke once you're done. I usually do half a bottle directly into the intake and put the other half in my fuel tank. Hopefully your tick goes away, good luck.
03 Rubicon a.k.a "RubiX", 35x12.50 MT MTZ, 4" lift and all the other fun stuff Rubicons come stock with such as front/rear lockers, Dana 44s, T-MAX 9000lb winch, and much more to come.
Gone but not forgotten: 98 TJ; 4.5 lift, 33x12.50 Pro Comp MT, and lots more.