vacuum lines
Posted: Sat Nov 19, 2022 5:57 pm1975 IH 200 4x4 392
What vacuum lines are necessary?
What vacuum lines are necessary?
All of them!
Systems that need to function are:
EGR
Vapor canister
Spark advance
Choke pull off
Vacuum controls in the cab (if used)
heated air cleaner
heat riser (if vacuum controlled)
PCV system
and likely a few more I can't think of off the top of my head.
Should be a sticker underhood showing vac line routing.