I would like to run some seafoam through the engine, and the bottle says to run it through the vacuum system. Which line do i use? I know it is probably a dumb question but i just want to make sure i do it right. 1995 z28 LT1

 

Pull the vacuum line off the power brake booster. Put a small funnel right into the hose, making pouring easier.

 

You can also buy the seafoam in a spray can . just slip the tube that comes on the can into the spray nozzle then slide it into the air intake boot give the car a little gas to keep the car from stalling and spray it