I have a 2006 Supra with factory ballast and the front bags fills up by itself (the 2 rear bags don't do it). I figure there must be a check valve that isn't working. Any ideas?

Mike, <BR>Assuming the ballast system is like that on the Mobius line, there is a manual override toggle switch on the pumps that needs to be in a certain position. If not, the ballast will fill by itself. Check your owners manual and you will find the description and location of the small toggle switch on the pump you need to reposition. Since only the front bag is filling, only one of your toggle switches is incorrectly set. <BR> <BR>(Message edited by WakeShoe on May 28, 2007)

Lift up the rear center cushion and there will be the ballast solenoids. You want to flip the toggle switch for the center ballast solenoid. Then it should only fill when told too...

Thanks for the advice guys. Don't know if this matters, but it doesn't fill all of the time, only occasionally.