Master,
In my feeble attempt at replacing the vacuum line to my power brake on my 1989 Trooper 2.6L 5 Speed, I discovered a "check valve" in the hose. The Cro-Magnons at the Auto Parts place were mystified, leaving me with no convenient replacement. What is the function of this valve, and is it essential?


Don
1989 Trooper II 2.6L
222,222