Don’t use Sea Foam Motor Treatment in a vacuum line [SOLVED]

I was just wondering when Sea Foam changed their product directions from including the vacuum line? I have an older can that states it could be applied through the vacuum line and/or through the fuel tank. I bought Sea Foam the other day and it just states through the fuel tank. I was just wondering if this method is still good or if it only applies to your old product or older vehicles.

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Jim D.
Jim D.
3 years ago

That’s a great question Andrew. Since 2017, Sea Foam cans do not show any mention of vacuum line application. In prior years the can stated to use “Only Professional Certified Technicians” when applying to a vacuum line. We do not recommend that anyone apply a liquid into a vacuum line. Sea Foam Spray through the throttle body works far better, much safer, and disburses evenly to all cylinders.