Originally Posted by hypurone
No, the vacuum is generated at the intake manifold/maggie and fed to the booster via the line. You want to crimp it shut at the manifold end to eliminate the booster, line and check valve. If that identifies the prob, then you can work your way down the line to see what component is the prob. Capiche?
So, if there is no change when I do that. Then it's NOT the check valve at the brake booster?
I took the hose OFF of the valve at the brake booster and plugged the hose with my finger. It was still missing. So I guess that's the same thing.