Here is my write up on the Seafoam treatment I performed over the weekend.
1.) First, I made sure the engine was warmed up by driving it to Walmart to buy Seafoam and throttle body cleaner.
2.) Next, I did end up using the brake booster vacuum line for simplicity. I poured 1/3 of a can of Seafoam into a shallow cup.
3.) Keep your thumb over the vacuum line until you are ready to stick it in the cup. Small sips are best to prevent the engine from stalling out.
4.) A few times I did need to rev the engine, so I just pulled on the throttle body cable. About the time the last sip was completed, I saw a puff of smoke exit the tailpipe.
5.) I quickly turned off the engine and let it sit for 30 minutes. While I waiting, I also cleaned by throttle body.
6.) I removed the throttle body boot and used a rubber strap to keep the throttle body door/flap open. I sprayed throttle body cleaner into the opening and used old tooth brushes to clean the inside.
7.) It was very dirty, thick sludge and tar like gunk stuck to the tooth brushes. I used over a 1/2 can of cleaner before it was finally clean. This process took almost 30 minutes.
8.) I then cranked up my Pathy, revved up the engine and OMG!!!!! White/Blue smoked rolled out of it for almost 10 minutes. Thick as fog at first, then finally thinning out.
9.) For me, I can tell the difference. The engine is more responsive and the RPMs climb quicker and much smoother, no hesitation or resistance in the power band.
Good luck !!
Curt