Failure of plastic vacuum lines on Ford Bronco

Problem Description and Possible Solution

Vacuum hose failure is common due to engine heat and time.  Vacuum hoses are made of plastic.

Problem Data
RepairPal Verified
Average mileage: 166,166 (154,000–175,000)
Exhaust & Emissions affected: 5.0L V8
2 model years affected: 1993, 1995
7 people reported this problem
Viewing 1 - 4 of 4 comments
All vacuum lines are failing. all plastic lines are britle. starting to replace one by one. haveing trouble finding a good diagram to work off of.
vacume lines keep cracking.I keep replacing them with oem plastic lines not knowing the lines themselfs are the problem
while changig spark plugs, i had to move plastic vacuum line, and the plastic vacuum line where no longer flexable, they where very rigid and brittle, as a result they broke very easily.