[QUOTE]Originally posted by pmizell
[B]Ok, the X66 goes into the main plenum, but where is this? Sorry for the newbie ignorance here.

Even if this would be the right place, you need to be VERY careful with how much you allow to be sucked in at a time. I've tried a similar product on my '95 Miata and the Miata technical service bulletin has a reducing oriface to insert into a small hose so that too much isn't added at a time. Too much and your crankshaft bends from "water lock," as the liquid won't compress like air.

Granted the 1.8 liter Miata engine is half the size of my 3.0 1989 300E, but I'd be using locking plyers or soem other mechanism to insure that the can empties VERY slowly.

For what it's worth, Miata says to empty 1/2 the can while revving the engine and then allow the engine to stall at idle, sit for up to 24 hours, and then run the 2d i/2 thru. Worked verey well. Mazda sells the product as a top engine cleaner too for about $2.50.

Just my 2 cents worth.