Here are my vacuum readings at idle.
20" at T fitting on main brake booster line.
20" before green dashpot.
20" after green dashpot.
15" on line to modulator dropping to 5" at 2000rpm.
When I applied a vacuum to the modulator line, it did not hold. I have isolated the leak at the modulator. It's not supposed to have any leak is it?
Me thinks I have found my problem.
John