Do I need a Decel Valve ?
 

This week I purchase a 1974 914 2.0L. Looking over this project I noticed most of the vacuum lines were missing so I purchased a kit from AA. While installing the new vacuum lines I notice the decel valve is missing. So the question is do I need one and if not should I plug the vacuum lines that would normally go to the decel valve? If I need one, suggestions on a source for one. Thank you for your help.

In general, there aren't very many extra parts on these cars. I know those who insist that the decel valve helps protect the Manifold Pressure Sensor from being overstressed. I'm not convinced it helps with that too much, but it can definitely help keep the engine from stalling as easily when you put the clutch in. I would get one if I could.

If you can't, then plug the hoses that would go to it. They will be large vacuum leaks if you don't plug them--or at least, the two hoses that go to the plenum will be.

--DD