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Old 11-11-2012, 01:10 PM   #1 (permalink)
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Question Where to inject Seafoam on 99 DOHC Motor??

Last time I tried using a vacuum hose that went to the duct before the throttle body. That didnt work too well at all. Where should I use instead? I didnt see a hose going directly to manifold etc. Thanks in advance CJ
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Old 11-11-2012, 03:55 PM   #2 (permalink)
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try this from the website:

Sea Foam | How to Use Sea Foam Motor Treatment


or if it's the Deep Creep, there's a section here on throttle / intake cleaning

http://www.seafoamsales.com/how-to-use-deep-creep.html
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Old 11-11-2012, 04:09 PM   #3 (permalink)
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Pull the hose off the brake booster. Should have strong vacuum coming from it to the intake manifold. Car might run rough because of the vacuum leak, but slowly dribble it in, do at least 1/3 can. I usually do 1/2. You may need someone to hold the gas at 1500rpm or so to keep it running, but the key is to apply it slowly. Then shut the car off for a while. Get ready for a smoke show when you fire it back up.
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Old 11-11-2012, 09:35 PM   #4 (permalink)
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Use as hose after the throttle body, like the booster hose. Remember to go slow so you don't stall the engine.
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Old 11-11-2012, 10:19 PM   #5 (permalink)
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what does Seafoam do for an engine?
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Old 11-11-2012, 11:24 PM   #6 (permalink)
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Quote:
Originally Posted by caseitman View Post
what does Seafoam do for an engine?
The idea is that by introducing Sea foam (which is a mixture of solvents) through the intake, the liquid will be sucked down into the cylinders and clean the carbon deposits off the intake manifold, runners, and the backside of the intake valves. Clean valves and runners will improve performance, fuel economy, and engine smoothness. However, the method of introducing the liquid into a vacuum port is very crude, and will really only just run down into one or two cylinders and create a smoke show. Suffice to say, the pros never do it that way. The best way to do an induction cleaning is by using a mist that's introduced at the throttle body, so the atomized liquid can reach all cylinders equally.

All the smoke gives the psychological effect that all the carbon has been cleaned out of the engine. So in a way Sea foam is the ultimate automotive placebo product, and I think that's why it sells so well.

Personally, I only use Sea foam on carbureted engines, since the carb helps atomize the liquid properly and sends it equally to all cylinders.
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Old 11-12-2012, 03:13 AM   #7 (permalink)
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Quote:
Originally Posted by behlinla View Post
The best way to do an induction cleaning is by using a mist that's introduced at the throttle body...
Such as?
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Old 11-12-2012, 08:52 AM   #8 (permalink)
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Spray of solvent in fine mist into Throttle Body or carburetor ..
I just run a can through my gas tank every month in Winter.
Done incorrectly you can really screw things up like O2 sensors and foul plugs!!
At $6-10 a can it gets kind of pricey for the benefit.
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Old 11-12-2012, 11:02 AM   #9 (permalink)
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Quote:
Originally Posted by DN101 View Post
Such as?
Sea Foam Spray for one. 3M also makes a similar product. But the professional products (like BK) use an air-pressurised cylinder that's hooked up to a nozzle placed in front of the throttle plate to dispense the product.

Last edited by behlinla; 11-12-2012 at 11:08 AM.
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Old 11-12-2012, 11:07 AM   #10 (permalink)
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rm.

Last edited by behlinla; 11-12-2012 at 11:08 AM. Reason: Double post
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