P38 EAS weirdness

I've posted this on a few other forums, getting a bit desperate... sorry if you've read it already.
Front of my 4.0 '98 is continually dropping when running- enough that the
valve block raises it up a few clicks every minute or so. The compressor is running nearly all the time to keep up. What's unusual is that it's across the front axle, i.e. it's not just one leaky bladder- or is it? I've had a bag go bad before, I diagnosed it by leaving a door half-ajar overnight, & came out in the morning to find the driver's side front corner down to the bumpstops- she certainly looked ridiculous with her bum up in the air. A new airbag fixed it- which means that the front axle has one newish airbag, and one original. This is different. I don't understand it at all. It's as though the 2 front bags were connected somehow, but this is a P38 not a RR Mk3. I've sprayed detergenty water onto the side of the valve block, but seen no leaks- nor can I hear any, either from that valve block area or the bags themselves.
Ladies & gentlemen, your thoughts please? I need to get this fixed by weekend after next- we're off to Mt. Disappointment for fun & games. If I don't get it fixed, there could be more fun & games than I bargained for...
TIA
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Natalie Drest nearly made me spill my Shiraz on 15/05/2006 12:16 by writing:

Sticking valve(s), or leaks affecting both sides.
Well, that's my first guess. Hard to tell without seeing the vehicle.

I've seen problem in the past where it is only one side that's leaking, but it seems to be both that are the problem.
What happens if you leave it without the engine running and the doors open (no self levelling going on)?
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Natalie:
Sounds like a leak in the line to either one of the front air bags. If 1 fails in the front they both go down. With the car running check for leaks in the hard air lines and at the bladders. I have heard of this conditioning worsening as too un-seat the bags from the cradle. Good luck.
Jack
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