How did you locate your vacuum line in your 3.5L Intrigue, I am wanting to run seafoam through as well.

Thakns

A lot of people use the vacuum line that runs to the brake booster. Personally, I put 1/2 a can in the gas tank, and 1/2 a can in the crankcase and change the engine oil after 50 to 100 miles.

i was taught to use a whole can of seafoam.increase idle to 1500 rpm. you need to restrict it to only flow in at a certain rate just about til it runs crappy.let vehicle sit for 15-20 minutes. then let the smoke blow!!! lol

use the brake booster line