No vacuum?
Years ago when Ford came out with the first eco-boost in their F150 and the engines started hydraulically locking because water would accumulate in the intercooler, and then slug the engine, I suggested drilling a 1/16" weep hole on the lowest lefthand portion of the intercooler to let water out.
After all, every intercooler before canister emissions came with a factory weep hole in their intercoolers for that reason but Ford couldn't because the brave, new world is more interested in saving the children than good design and reliability.
The internet blew up on me. It'll suck crap into the engine, they cried.
Clearly, they didn't understand what a turbo does. Eventually,
I made a video that showed the intercooler was never under vacuum.
Now, if the hole isn't a small hole, but a larger hole, you can get scavenging which could draw outside air into the intake through a hole in an intercooler.