Re: Help my bladder won\'t hold......
Only thing I can suggest is to pull the seat, 4 bolts, 2 screws, so you can gain easy access to all areas.
Put it in a quite room, pump the bulb up and listen carefully.
If it's leaking at the valve where the bulb is try snipping a bit off the line and re-attaching with new zip tie. If the bulb itself is hissing you can replace it for about 7 or 8 bucks at a medical supply place. It's the very same as a squeze bulb for a blood pressure cuff. (though you may need to pull the one-way valve out of the new one and stick it in the other end for true stock appearance, to go even further, use the original one way from the old bulb which has a slightly different appearance.)
Hope this helped.