[My427stang]

Also, seeing one of the other posts. Power valves have nothing to do with idle. A power valve only works when two things happen.

1. The throttle plates have to be open, pulling fuel through the boosters

2. The vacuum behind it has to be lower than its opening value

So, at idle, when vacuum is high and plates closed, the thing doesnt do ANYTHING

Even if vacuum was WAY lower than its value, the plates are closed, so no air is being drawn across the booster to pull the fuel in.

The only exception to that, is what I described above, if the primary idle is open SO MUCH that it causes airflow across the boosters, it could pull some main jet fuel into the motor, and theoretically if it had the wrong PV it could also pull more through that circuit

However, say this to yourself PV does nothing at idle over and over LOL