Originally Posted by jw_in_Cali

So I went ahead and ordered a new vacuum modulator. When I took out the old one, the old one has a pin attached to it, which does easily come off (not sure if it is suppose too?)

I've seen a picture showing a clipped on spring over this pin.

Can anyone confirm if there should be a spring over the pin?
Also can anyone confirm if the pin on the old one can be removed to use on the new one?