It looks like it is the brake booster check valve. I managed to find the part online (F7CZ2365CA or F7CZ2365BA), although I'm going to try to make sure it's causing a vacuum. Even though there is a clear hissing sound when I listen to the part through a hose, it doesn't seem to suck in water...
Hi everyone!
I've been doing in the past few days some maintenance work on my car (Escort 1998 SE 2.0L SOHC) and, after now having a car that runs smoother and stronger than ever, I have been searching for a possible vacuum leak after reading positive long-term fuel trims at idle.
I...