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Question: Vacuum lines

Gvinson

New member
Joined
May 24, 2017
Messages
4
Location
Indianapolis, Indiana
86 C4. I am looking for some help with some vacuum stuff. I am replacing the hard plastic lines that run under the plenum. I know one of those goes from the EGR valve to the solenoid, and one goes from under the throttle body to the solenoid, but there are a couple more that I am not sure where they go. One connects to the fuel pressure regulator (i think) and then runs under the plenum to somewhere that I can not figure out. The plastic lines appear to be broken. Anyone know anything? Help greatly appreciated. Thanks!!
 
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Joe C

Well-known member
Joined
Feb 26, 2005
Messages
78
Location
palm coast florida
Corvette
1985 two-tone silver/graphite z51 auto
86 C4. I am looking for some help with some vacuum stuff. I am replacing the hard plastic lines that run under the plenum. I know one of those goes from the EGR valve to the solenoid, and one goes from under the throttle body to the solenoid, but there are a couple more that I am not sure where they go. One connects to the fuel pressure regulator (i think) and then runs under the plenum to somewhere that I can not figure out. The plastic lines appear to be broken. Anyone know anything? Help greatly appreciated. Thanks!!
the vacuum line from the pressure regulator is part of a molded, rubber/plastic assembly that goes, one end, to the plenum and pressure regulator, and the other end to the AIR switching and control valves. reference attachment --

if any of the plastic tubing is broken, you either have to locate "used," new NOS, or fab a replacement piece. most auto parts store sell bulk plastic tubing and the correct size vacuum hose.
 

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