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I just did this on my daughters car, a 1991 Mazda. (I didn't want to risk it with the SAAB.) It's called Chinese Water Torture and the Seafoam is sucked into the intake through a small vacuum hose. The Mazda runs a bit smoother now, but it didn't create much steam like I expected.
I'm going to try the SAAB next but just haven't gottent to it yet.
Here's the procedure:
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• Engine should be fully warmed up.
• Connect a 18" vacuum hose from the port above the throttle normally used for the cruise control.
• Take a jar (normal size mayo or spaghetti sauce jar) filled with water (this would be just under 4 cups)
• One hand holding throttle open so engine remains in the 3 to 4 thousand rpm range.
• Dipping hose in water over and over approximately once a second for about 1/2 (0.5) second or less, less often if engine slows significantly, engine will run rough so use throttle to maintain engine speed until all the water is gone which will take only a couple of minutes more or less.
• Repeat with the 16 oz can of carbon cleaner.
Remain alert and focused and just don’t let the hose stay in the water/fluid for much more than half a second at a time and you should be safe. I did observe my mechanic at times leaving it in for more than half a second but not more than one full second, I don’t think I would leave it quite that long, longer than that and you may feed in too much liquid and result in serious engine damage, so this is a potentially dangerous operation. You know you are feeding in too much fluid if the engine speed drops signifaicanly even though you are trying to maintain it with the throttle. I strongly recommend against leaving the hose in the fluid long enough for the engine to stall as in the link posted by Stu, even the Sea Foam can talks about letting it stall out while running at a high idle. There is no way I would do that to my car and this was not done to any of my cars and I still had excellent results. Starting with water gives it some extra cleaning and is worth doing (carefully).
I dearly whish I had known of this process years ago, there is no question that it has made significant improvements to my cars. I would not hesitate to do this myself to any car. Yes it is a whole lot simpler than it sounds and I will not hesitate do it to myself to my 36 thousand dollar Volvo when I take it out of storage in the early spring. And there after to all my cars about once a year or every 5000 miles.
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If you search on Google, you'll fine the above info on some Mazda and Volvo discussion sites.
posted by 206.228.131...
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