What puke tank are you using and how is it plumbed? Is it shared with the dry sump tanks puke tank? FWIW on my car I pull 19" of vaccuum and see noting but water. The dragster pulls 14" when sealed up and also pulls nothing but water. Both are pulled off of one valvecover. Be more intersted in your puke tank and plumbing at this point since you say it is not full but blowing everywhere.