The only problem i've had with it is breathing....
sucked mine through the booster line, but i never just submerged the end of the hose. Held it at an angle and just let the tip near it and let it "slurp" the seafoam (like people slurp soup off a spoon). the entire can DID get in there. took me about a minute or so...by the time i got to the bottom of the can it just started to smoke. Shut her off, sat an hour, started it up, its smoked like hell, i coughed like hell, i drove it like i stole it on some back roads, and throttle response has never been better. Its very wierd driving down the road and not being able to see behind you through the smoke...