Bought a can of seafoam yesterday for my 95 with a bit under 89k on her. Since buying the car, it's had a low-rpm studder at times when holding the accelerator steady. Added a third of a pint of seafoam into my gas tank, and a day later, it hasn't studdered once, so that's very good. I'm wanting to suck it through a vac line now, but don't know whether I should do it through the PCV valve, or the brake booster line? Also, could someone point me in the direction of a good diagram for both? For the brake booster, should I just pull the end of the line that connects to the vac tree?