i used seafoam carbon cleaner on my sisters civic ex
i followed the directions from the SHO how-tos bak in the day
about the same as the ones viper posted
I just unplugged the hose and turned on the engine and put the seafoam in a lil cap since the seamfoam isnt a spray,
and i let the engine suck it up, the idle was kind've crazy since the air/fuel ratio was mostly fuel wit little air, so my dad was giving it gas to keep the engine alive, after it sucked enough, i shut off the engine and let it sit for 5 minutes to dissolve all the carbon deposits, at that time i put those bak together and cleaned up the spilled cleaner
then i looked up and was shocked at the huuuuge!!!! cloud of smoke in the distance, it was caused from the engine burning some carbon cleaner
well after 5 min i started it up and went for a drive as instructed in the directions, u have to drive it till smoke stops coming out of your mufflers
well when i drove it i would leave clouds of smoke behind, the burnt carbon, i drove it for 5-10 minutes till it stopped smoking
i still remeber that day cause i got a ticket shortly after it stopped smoking because i didnt stop fully at a stopsign, what bull shit
it looks crazy when ur leaving clouds of white smoke behind you!!
heres a pic