Seafoam wont harm anything. Just pull off the vaccuum hose from the brake booster and dump half a can in while running. Shut it off on the last big gulp. Take the deep creep spray and blast all inside the intake/tb as deep as you can get it. Full tank of gas = ~half can~ (Depending on how many gallons). Other half in the oil. More it smokes after about an hour or so of sitting the more it is burning off.
replacing O2's is not "general maintenance". If they arent messing up don't mess with them. Seafoam in no way/shape/form will harm the O2 sensors.
Last edited by orangeapeel; 06-10-2010 at 12:53 AM..