Index: firmware/App/Controllers/DryBiCart.c
===================================================================
diff -u -r2d295ca85f19e95da42476a57ca6b4496baf980a -r1a908fe3e365f90a61713566d0ab2ed94d31525d
--- firmware/App/Controllers/DryBiCart.c	(.../DryBiCart.c)	(revision 2d295ca85f19e95da42476a57ca6b4496baf980a)
+++ firmware/App/Controllers/DryBiCart.c	(.../DryBiCart.c)	(revision 1a908fe3e365f90a61713566d0ab2ed94d31525d)
@@ -1526,6 +1526,11 @@
     if ( d66Pressure >= DRY_BICART_FILL_COMPLETE_PRESSURE )
     {
         // persistence
+        // start the persistance timer once d66 reaches 11 PSI
+        if ( 0 == dryBiCartPersistanceStartTime )
+        {
+            dryBiCartPersistanceStartTime = getMSTimerCount();
+        }
         // check the the maximum cart pressure during persistence on D66
         if ( d66Pressure >= MAX_DRY_BICART_FILL_COMPLETE_PRESSURE )
         {