To clarify:
Truck was turned off. CTIS system turned off.
1 week later, the left front tire was flat.
Inflated tire with my compressor.
It deflated again overnight.
As such, we re-inflated tire with my compressor, turned on truck, took rpms up to 2000. Turned on CTIS.. No innapropriate readings...
Once truck was turned off, overnight the tire deflated again.
We checked (and replaced valve stem core)...
We checked for leaks all over outside of hub, including valve stem, bead around rim, CTIS valve, lug nuts, etc. AND checked air lines all the way back to the splitter on front axle.
We re-inflated tire and overnight it went flat again....
We took tire off of truck and dunked it at his tire shop with 80 psi in it... found no leaks...
left it overnight off the truck and it held 80 psi...
Put it back on the truck and hooked up CTIS components without turning truck or CTIS on and overnight it went flat again....
We took tire back off and disassembled hub... replaced o-ring, cleaned and packed everything again... Put the tire back on the truck fully inflated and never turned truck or CTIS back on and it went flat overnight.....
What do you think?