P38 westminster 2002 thor REAR suspension

I know there are threads assunder on P38s' EAS. I couldn't whittle them down to my particular prob.
I'm currently working through the dashboard out trick and overhauling everything in the entrails that you all know about.
Needless to say the battery's been disconnected for a number of weeks.
BOTH rear bags have simulteneously deflated. No controllers or sensors could possibly have been in the equation owing to no juice.
I've renewed the compressor as part of my fusebox meltdown and, hitherto, the ride height and behaviour have been normal. Or at least as far as I've noticed.
Is there anything along the line that could bring about ONLY the rear bags going down? The fronts are still well up. I've got a dedicated pump up pressure spray which I have loaded with super-soapy solution. (I fill it while the wife's out........"don't use too much of that"). Being paranoid about anything going wrong with these things, I squirt it everywhere at will. I have renewed all bags, discs, pads calipers and shockers myself over the years I've suffered. The whole underside gets waxoyled annually along with its service.
I guess that each corner has its own individual solonoid in the valve block but, is there anywhere else where the two rears have some kind of control or connection in common?
I have no faults showing up prior to this latest undertaking.
By the way as part of my current overhaul I've bought a valveblock overhaul kit which I'll be fitting along with a new dryer.
Regards all
Peter

Rear airlines have been known to spring leaks where they cross over the exhaust if the exhaust has ever had a leak. Also, I hit a pothole (read collapsed mine in the road) once at speed and it somehow jiggled the top cap loose enough to leak very slowly. Then there are the nose cones on the valves that feed the bags. Or if you have an emergency inflation kit fitted they tend to leak like buggery.

I would get her up on high and then pull the EAS delay timer and leave her for a few days and see if they go down again.

If just the rear has gone down with no power on it has to be an air leak. Could be from bags, connections to bags, pipes themselves, pipe connection to valve block, small O'ring at base of solenoid valve seats, or solenoid valve seals to seats. They are the only items in the system that air can leak from to cause the rear to drop.

Many thanks. I guess I knew it was back to basics. I post on here for "instant gardening". The simultaneous deflation, I thought, might throw up a clue. As it happens, I have had an exhaust leak- quite a significant one come to that- and my local friendly exhaust man has carried out some pretty serious surgery along the way. I can see that plastic pipes could well have had the same interference at the same time. It was nice of you to reply patiently, though. You could well have cracked it for me. It's taken 3 or 4 weeks to drop, by the way, which is why I'm not getting fault codes or "vehicle has moved". Very best regards. P.

supapete said:

Many thanks. I guess I knew it was back to basics. I post on here for "instant gardening". The simultaneous deflation, I thought, might throw up a clue. As it happens, I have had an exhaust leak- quite a significant one come to that- and my local friendly exhaust man has carried out some pretty serious surgery along the way. I can see that plastic pipes could well have had the same interference at the same time. It was nice of you to reply patiently, though. You could well have cracked it for me. It's taken 3 or 4 weeks to drop, by the way, which is why I'm not getting fault codes or "vehicle has moved". Very best regards. P.

Click to expand...

You can ignore vehicle has moved anyway.