Nope you slowly let the vacuum suck it in then when there is just a little bit left dump it in and stall the motor let it sit for five or ten minutes then restart and enjoy the smoke show. You were just burning it all off as you were dumping it in. You should have seen a little smoke but its not like after you let it sit and work all that crap loose.

 

It says to stall the engine right on the can. If you don't, then like others have said, it all gets burned off and there's nothing sitting in there while you're letting the engine sit.

 

isnt that bad for the Catalytic Converter?

 

Who runs cats on their truck? I dont.

 

Well according to the website and the can no its actually good for the cats. It claims to clean them as well.
http://www.seafoamsales.com/gasoline-engine-faqs.html
Check out their faq's.

 

Run no Cats in Pa and you dont run your truck... every year inspections plus emission testing... Pa State of Taxes and Fees...

 

same in Texas, plus my wife works for the state air quality so Im out of luck running o2 sensor simulators

 

I thought that was only around the big cities?

 

Haha that's the truth man!

 

mine didn't stall but almost did. Shut it off, let it sit for like 20 minutes and then started it. Smoked like a beast! Probably for about 5 miles on the test drive. heh