I've had the a/c system checked twice by two different a/c shops. Neither could pinpoint a problem but the last one suggested a evac and recharge and to put dye in the system to see if there is a leak. I had salesman at AutoZone say that it may be the A/C expansion valve. However after reading I seen the that my vehicle had the oriface tube. So after disconnection the A/C lines i found out that there is no oriface tube. Can someone enlighten me on what the situation is.