[V8] Seafoam

[tlastre01 at sprintpcs.com]

I've read a couple of times of Seafoam through the vacuum line. I have a little bit of a rough idle so I was wondering if a little bit of cleaning might be in order. My question is which vacuum line and how much Seafoam? My V8 has 138k when I bought it (8 months ago with 111K), it was running on barely 4 cylinders. I changed wires, plugs, rotors, caps and installed a K&N air filter. I'm wondering if there was accumulation of carbon that might need cleaning since it wasn't detonating the fuel.
Thank You All Very Much
Tomas
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