[STEELCITYFIREBIRD]

So I encountered my first Bonne-fied plugged brake hose on my '98 Bonne. Won't pass compressed air from either direction. Was dragging brakes heavily.It was acting like a check valve, as when I cracked the bleeder it would release, but tighten back up on the very next application of the brakes and drag heavily. Crack bleeder, repeat.

So what usually happens here?
Hose deterioration or foreign material?

I am going to do an autopsy but don't want to lose the cause in the dissection. My plan is to cut each end off and check for restriction, then keep cutting the remainder in half length wise till I find the restricted part of the hose.

I gotta know the cause.... just cause that's my nature!