ahofam123

I've had mixed results with seafoam. I've used it on some vehicles and experienced the immense smoking as described above, but I have used it on other vehicles and have experienced clogged egr valves and other side effects. Its a good product to use if you don't mind fixing some of the side effects that it may cause.

ehall

For those interested, there was a similar thread on the 944 turbo board about two months ago, maybe less.

Zero10

The brake booster hose is huge. I would use the fuel pressure damper hose. I used some 5/16" hose, and IMO it was too big. If I let it suck liquid, the engine stalled.
A 3/16" hose would probably be about right.

The idea is, let it ingest a good portion of the can (they say 1/3rd, but they also say 1/3rd in oil, 1/3rd in gas, not happening on my car), then shut it off and let the solvent work it's magic. After 5 minutes, fire it back up.

I honestly can't imagine it doing any real damage, the worst it could do is foul up your plugs from not burning completely.

mark944turbo

Except if it burns hot, in which case it can cause all kinds of damage. It could also screw the cat up big time. Im not saying it does either of these things for sure, but its still a risk until some data is shown on how it burns.

ahofam123

I'm still diagnosing the egr problem that it set off on my Escape. I ran 1/3 of the can through the pcv vacuum line on a cold engine. The check engine light came on about 20 miles later. It could be as simple as some of the carbon that got free and made its way to the egr valve and clogged it. I'm hoping that its this, otherwise it could be the carbon fouling up the pressure transducer which would require replacement rather than cleaning.

White Pony

LOL, Seafoam and Marvels Mystery oil both are ghetto cure alls. I use them both, but with caution. Mostly in the gasoline for fun/shiz and giggles.