- Is this a vacuum actuated valve or backpressure type. It does not respond to full vacuum.
- I assume the passage into the intake is blocked because the idle does not change when I open the valve and I cannot blow compressed air thru it. Plenty of exhaust air is getting to the valve. Problem is that I cannot find any opening into the intake manifold. There is a passageway towards the carb about 1/2" wide and 1 1/2" long but using various bent wires, coat hangers etc I cannot find any way into the manifold.