try "helping" it...get a floor jack under the front K-member(if possible) and jack it up a bit. If you cant get a jack under it, use the factory jack under one side. lift it up about 3 inches so you can get a floor jack under the K-member. Now cylce the ignition, and see if they inflate at all. Once they begin to inflate, you will have a much easier time isolating the leak.
However, one thing Eddie has taught me is that by the time a leak is visually discovered, it's most likely been in existance for a very long time, meaning the compressor has already been working over-time. Plan on AT LEAST getting a compressor from Eddie.
once the car is up(if it is up), use a spray bottle and hose down the front air bags with soapy water...look for bubbles. check the solenoids for leaks as well.
It sounds more like a compressor issue. if the vent colenoid is stuck open, the compressor is leaking as fast as it is trying to fill. you wont hear any air...
Good luck Marine.