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seafoam in the brake booster vacuum line?


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It helps clean it out, such as carbon buildup and stuff like that. Don't let it suck it in too fast though. It will make a lot of smoke when you do it so point the tailpipe down wind. The vacuum port selected ideally needs to able to let it distribute to all the cylinders, not just basically drain into one cylinder. Throttle body and plate can usually use a cleaning too. I like to get a good amount sucked in with the engine warm, then let it sit about 10-15 minutes for it to dissolve junk, then fire it back up again. Its not a bad idea to give an engine oil change afterwards. Seafoam has a little bit of water in it so it also helps to give it a big of a schteam cleaning.

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