Seafoam for 2002 Honda Accord 4cyl f23a1 engine gets Smokey: this is the final product after adding Seafoam into my car's vacuum hose. My very first Seafoam done at 88,473 miles and I am the original owner when I bought the car. I keep my car very well maintained, so there was less smoke than I expected. Check out the other videos I uploaded with how I started the whole process.