Anyone use Seafoam?

[Yaris Hilton]

The Seafoam itself smokes. Put it in a brand new engine and you'll smoke up the whole neighborhood. This stuff isn't anything new, there have been similar engine decarbonizers sold since the early days of the automobile. They went out of fashion when catalytic converters came along. It's possible to badly overheat a catalyst while the engine's misfiring and putting out unburned fuel and solvent into the exhaust. Last year I successfully cleaned up my Mercury Villager's engine with a similar solvent. Afterward it ran better and had no apparent harm.

The other old method of cleaning carbon is, of course, to trickle water into the warm running engine's intake. The rapid cooling shocks the carbon loose from the surfaces.

You'll need an OBD II code reader to clear the misfiring code when you get done.

[YarisSedan]

Originally Posted by Yaris Hilton

The Seafoam itself smokes. Put it in a brand new engine and you'll smoke up the whole neighborhood. This stuff isn't anything new, there have been similar engine decarbonizers sold since the early days of the automobile. They went out of fashion when catalytic converters came along. It's possible to badly overheat a catalyst while the engine's misfiring and putting out unburned fuel and solvent into the exhaust. Last year I successfully cleaned up my Mercury Villager's engine with a similar solvent. Afterward it ran better and had no apparent harm.

The other old method of cleaning carbon is, of course, to trickle water into the warm running engine's intake. The rapid cooling shocks the carbon loose from the surfaces.

You'll need an OBD II code reader to clear the misfiring code when you get done.

I dumped a whole can of seafoam in a car that ran only chevron it was a really old oldsmobile. Let it sit for a hour. Started it up and just a small puff of smoke and then that was it. No further smoke after that. Car had nearly 180k miles too. Nothing near what my yaris has and the amount of smoke it put out.

Also my acura i ran 5 cans of seafoam not joking at all. Over teh course of a few weeks. The last time if finally stopped smoking. I assumed the engine was finally spotless clean like new again.