I do not know where the "manifold vacuum line(s)" are on my vehicle (2001 Ford Focus ZX3, Zetec engine).
I would like to try something called, "Sea Foam." According to their site, you are supposed to pour 1/3 to 1/2 into the "carburetor throat or into any main manifold vacuum line that DISTRIBUTES EVENLY TO ALL CYLINDER."
See here: www.seafoamsales.com/how-to-use-sea-foam-motor-treatment.html
Here is a picture of my vehicle, under the hood as of right now (pardon the anti-freeze debris; Recently damaged hoses):
- http://imgur.com/a/lWRC3#0 (two pictures)
Thank you in advance, as always.