I was giving the new truck a seafoam treatment and I think that the back three cylinders are getting most if not all of the seafoam. The brake booster line goes into the intake on the firewall side of the center of the intake. Wouldn't the air flow take the treatment to the back three only, I am not sure if it can go against the airflow? What are your thoughts.

 

You can pull the throttle opener vac hose off the throttle opener and suck the SF through there. It will reach all the cylinders that way.

 

Anyone have a picture of the throttle opener vac hose? Or maybe someone could describe what it looks like?

 

I just did a SF treatment on my truck and sucked it through the brake booster vacuum line. It made a considerable difference. Is there a limit to how many times it can be done at one time?