Seafoam question

[bcossa2001]

I put seafoam in my 97 Avalon (150K) through the brake booster vacuum line and the engine sped up as I poured (slowly) the seafoam in.

I did the same thing on my 2003 Chrysler T&C minivan (52K) and the engine tried to choke down.

Why the difference??

 

[flatlandtacoma]

This is posted in the wrong forum.

But to answer your question, if I had to guess, I would say the Avalon was sucking in more air than the minivan when the seafoam went in. In my experience, most vehicles tend to bog down a bit rather than speed up.