Got a can of the spray in seafoam and sprayed it into the intake thru the line attached to the intake. this stuff is much better than the pour in kind it smoked a crap ton more. Dont do this in a location like me. the police came and questioned what i was doing (live on a busy busy road. but heres the vid.
we used a simular product when i worked at a dealership. the "kit" we used has 2 different sprays for the intake and gasoline additive that was put in the tank and we were hearing from customers that they were having smoother running and better gas mileage. i did it to my truck with with 285k and it def helped a lot. the spray shouldnt mess up the spark plugs like the can you pour in does either