First get all of your supplies together, i use one foot of 3/8 fuel line, it is sold by the foot and this is the perfect amount for the job, i used a pyrex glass to measure out 1/3 of an pint, i also used a small dish to feed only a small amount at a time. (i did this at my moms place so dishware was all that was availble)

now find the vacuum line going into the manifold right after the throttle body.

turn the red clip so you can see were the two ends seperate, then push down on the clip to remove it.

pull the vacuum line off to reveal the nipple where you will attach the 3/8 fuel line.

now attach the vacuum hose, feed it upwards out of the engine bay, everything is near the fan so be CAUTIOUS.

now feed the seafoam into the hose, SLOWLY.

in between feeding SMALL amounts of the seafoam into the engine, cover the vacuum hose with your thumb to allow the engine to return to a normal idle, thus more effectively sucking the seafoam into the cylinders.

after feeding all of the seafoam, turn off the engine and allow it to soak for 10 minutes, turn your engine on and enjoy the smoke.
some tips, remember to feed it SLOWLY this stuff can hydrolock your engine if your not careful
turn off the engine when your detaching/attaching the vacuum hose, it is near the fan so be careful
when you reattach the red clip push it on from the top then wiggle it till it is in it's correct place.
good luck
(this was done on a 2006 2.0l non pzev sedan)

now find the vacuum line going into the manifold right after the throttle body.

turn the red clip so you can see were the two ends seperate, then push down on the clip to remove it.

pull the vacuum line off to reveal the nipple where you will attach the 3/8 fuel line.

now attach the vacuum hose, feed it upwards out of the engine bay, everything is near the fan so be CAUTIOUS.

now feed the seafoam into the hose, SLOWLY.

in between feeding SMALL amounts of the seafoam into the engine, cover the vacuum hose with your thumb to allow the engine to return to a normal idle, thus more effectively sucking the seafoam into the cylinders.

after feeding all of the seafoam, turn off the engine and allow it to soak for 10 minutes, turn your engine on and enjoy the smoke.
some tips, remember to feed it SLOWLY this stuff can hydrolock your engine if your not careful
turn off the engine when your detaching/attaching the vacuum hose, it is near the fan so be careful
when you reattach the red clip push it on from the top then wiggle it till it is in it's correct place.
good luck
(this was done on a 2006 2.0l non pzev sedan)