daeron Posted August 5, 2008 Share Posted August 5, 2008 My understanding is that residual, unburnt seafoam makes it through the entire engine, and soaks the materials clogging up the catalytic converter; then when you restart it helps burn that off as well. I can't say this with too much authority, though, because the Datsun I had that I seafoamed religiously had no cat, and the soobie's cat is gutted, so I have never personally owned a vehicle with a cat to maintain... But at the very least, if you were to suck some into an intake line with the starter and leave the coil wire disconnected, that would certainly get some onto the honeycomb in the cat, and help clean it off when you restart the engine. Link to comment Share on other sites More sharing options...
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