I ran seafoam through the p5 tonight. In the past I had run it though the cruise control line but for some reason I decided to put it through the PCV vacuum line. I couldn't see it too well because it was dark but not I'm unsure whether the PCV line runs to all cylinders or just to #1 and #4. Does anyone know for sure? Any pictures of the PCV vacuum inlet from inside the intake manifold? If it only went to #1 and #4 I'm gonna have to buy another can of it. Also it did not smoke very much, only a little bit for the first 10 seconds or so.