DO NOT let it suck it in until it stalls. I've done this procedure on my DSM enough to know not to do that. You need to run your engine at about 2500 to 3000 RPM, let the vacuum line sit in the can until it's gone. Modulate the RPM so that it doesn't die, but don't redline it either. You WILL get a large cloud out of it, but that's normal. After the can empties, turn the car off. Let it sit for about 10 to 15 minutes and then start it up and run the piss out of it until it stops smoking. It's also HIGHLY recommended that you change your oil and spark plugs afterwords. It made a world of difference on my DSM, my Mirage, and my Contour (before I sold it).
