Originally Posted by pdoggy
It is a 2000 3.0 Flex 4x4. Any help is appreciated.
1998~2000.5 4x4 Rangers used the infamous Pulse Vacuum Hublock system to engage the front hubs when in 4x4 mode. The PVH system is a notorious leaker and it shares vacuum from the the vac reservoir with the A/C system.
4x4 Rangers in the first part of the 2000 model year had PVH's but those made later in the model year did not. If yours falls into the first group, then it has a branch vacuum line teed off from the A/C vacuum line to the PVH solenoid and you might try disconnecting and plugging it temporarily to see if that fixes the A/C control problem.