89 GM hard plastic vacuum lines...

[formulabird428]

During my repair of a cracked fuel line, I broke 4 of the hard plastic vacuum lines. They are multiple colors and are part of a large connector plug that houses 5 or 6 lines (passenger side, near the inner fender).

the lines were green, white, black, etc...i believe one runs to the EGR valve. Curious what does this affect? the car has 210k miles...so i really don't care much about anything aside from doing damage. emissions don't matter either...as i suspect that's what most of these are for....right?

[sly]

if there's enough of the hard line left... just slip some snug fit rubber vacuum hose over the cracked parts to patch the lines. the problem will come with vacuum leaks that affect driveability (engine may not run quite right).

[gadget73]

red is vacuum supply, green goes to the EGR valve, white and black go to the smog pump junk. I tossed all of those plastic BS lines and just got rubber hose to replace it. I have only the red line and the green line. The other solenoids are gone, along with all of the related plumbing for the smog pump. Absolute minimum, seal the red line off.

[formulabird428]

Thanks for the info. When you say red is the "vacuum supply"....what is it supplying?

[sly]

the vacuum needed by the emission system (EGR, smog pump, etc)

[1990LTD]

there's a single red line going down to the fuel pressure regulator....keep that one.