[encantotom]

if the LOWER solenoid has junk under the plunger, even though it is closed and should not be releasing air from the bag, it can still release air if something is holding the plunger partially open.

i had the opposite happen to me. i was at a truck stop and my coach raised all the way up on the passenger rear and the ride height valve was trying to let the air out, but the compressor was adding air faster than the ride height valve was releasing it trying to get to travel height. the seal on the plunger for the RAISE solenoid for the passenger side had blown and even though it was closed and should not have allowed air in, it was letting air in and causing the bags to fill to the max as the ride height valve was trying to release it.

i carry spares (and have rebuild kits for them) so an easy fix. that has happened to me twice.

not saying that is what it is, but it is a possibility. you can tell if there is air being released at the six pack manifold on the back. if so, and you are not in level mode trying to lower the coach with the panel up front, then the solenoid is leaking air by.

just something else to think about.

the raise and lower solenoids will do the drive and tag bags together unless you have them isolated with the tag switch up front like has been discussed.

tom