The vacuum line will suck it in. Only use about a third of the can in the vacuum line and be prepared for a lot of smoke. I put some in a separate container cause if your not careful you'll suck the whole can up. Also be prepared to pinch off the vacuum line and rev the engine if it starts to die out.awesome thanks for all the info guys!!!!:great: So from what I have been reading on this stuff you just unhook your brake vacuum line and poor it in right?