Ronmar
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Well the rubber glove test isolates it to just the one wheel valve, and you can add air to the wheel using an air chuck at the wheel schrader valve to see if it is having trouble sealing at higher pressures…This issue only occured at the increase of pressure to 80+psi with CTIS. At 50ish it wasn't doing it. When in stable state (not bleeding out qrv) all tires hold pressure (after rebuild on 2 that were leaking). Seems like a wheel valve(or two) aren't closing well (aire flow out it pretty fast till about 50 psi)
I wonder if the non rebuilt valves could be causing the issue? They have slight leaks from corrosion but the one of the tires that is loosing pressure if the rebuilt one and it has no bubbles now.
but in the end, the vented air must come from a tire thru that wheel valve…