About a week ago, I replaced that check valve that is supposed to fix the vaccum leak problems. It seemed to work, because it stopped the problem that I was having. But not for long, because it's doing the same thing again. Did I get another bad check valve? Did it break already? But I'm pretty sure it's something else. Thanks for always helping me guys, you're awesome.

 

i think there's a couple of them in that wad of vac lines. did you replace them all or just one. if they're pretty cheap, i'd just replace them again. make sure you don't have a cracked line.

 

I only replaced one of the valves, how many are there total? Should I replace this one too? How do you know if they've gone bad?