I just checked the line and it does not leak. I also didn't find fluid in the line so I am assuming the valve is not torn internally.
So, if the vacuum line checks out OK and no fluid spilled from the modulator line, what else can go worng with these modulators? Should I replace it anyway or would I be wasting money? Perhaps my problem is elsewhere? I did plug a manifold vaccum leak at the carb just now, but I don't think that was the problem... I'm going for a test drive right now but wanted to ask what else can go wrong with the valve or what else the problem can be just in case the car is still acting up after the test drive. Thanks
Update: car is still acting up... could it still be the modulator or should I check something else?