Max Blast
New member
- 21
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- Buick Ownership
- 1992 Riv
Hi
I just cleaned my 92's engine bay and replaced all visible rotten vacuum lines - and didn't do it right obviously because now I have stalling on the overrun, no kickdown and no cruise control. IIRC that is powered by the vacuum line that tees off as shown here.
The line that goes down goes to the kickdown solenoid, and holds a vacuum.
The line that goes up I think goes to hvac and cruise control - can anyone confirm? It seems to hold a vacuum.
Also, I broke that check valve when I replaced the lines and can't find anything like it. Anyone know the p/n?
Right now I just have a tee in there.
Hoping that some old codger here has a vac line diagram and experience with this.
I just cleaned my 92's engine bay and replaced all visible rotten vacuum lines - and didn't do it right obviously because now I have stalling on the overrun, no kickdown and no cruise control. IIRC that is powered by the vacuum line that tees off as shown here.

The line that goes down goes to the kickdown solenoid, and holds a vacuum.
The line that goes up I think goes to hvac and cruise control - can anyone confirm? It seems to hold a vacuum.
Also, I broke that check valve when I replaced the lines and can't find anything like it. Anyone know the p/n?
Right now I just have a tee in there.
Hoping that some old codger here has a vac line diagram and experience with this.