Int3Gra147

Has anyone had any problems with thier vacuum pressure on a JRSC. Cause, my JRSC on my GSR, in the morning when i go and start it up is like 0-2 and then dies, but if i give it gas, untill it warms up, and then it will ilde at like 1300, but with like 12 psi of vac. pressure. It has never done this before, it was always at like 20 psi. So could there be a huge leak somewhere then, possible where the charger and the mani bolt together?????