I always wanted to do this,so I bought some engine cleaner/conditioner today from repco - $15 and it's a Japanese product in a silver bottle.

Thanks Jaeyon for giving me a push hehe

The reason I didn't try it already is I read about engine's seizing using 'Seafoam' a similair product in the US.But heaps of people do this without a problem,so I'm going for it.I'm sure there won't be a problem,that is just rare cases related to Seafoam.The stories are on the net if anyone wishes to search em'

U can spray it straight into the TB also,half the can,filling up the Intake manifold,let it sit for 5 minutes,crank it over and feed the other 1/2 through.

Will report back with results in a week!