is there a way to manually vent or vent at all the rear bags, not for me , i have springs,but my buddys 93 mark, the rear bags aired up and never vented, it doesn't even vent after the last door is closed,i am stumped, he wants to keep his air ride so coil over conv is out, front bags ok, just wants the rears to vent.....help him out guys.....,.thanks! :Beer