pop the hood a check the vacumm line.its either broken or disconnected.driver side next to the brake booster and passenger side above the receiver dryer.
I have basically the same problem on my wife's '95 5.0. It is only coming out of the defrost vents. I popped the hood and found that the vacuum line on the passenger side by the receiver dryer is broken in two. However, I can't find where the other half of the line is. Just the part that comes from the passenger compartment into the engine compartment for about a foot to a coupler in the line. Then the line broke just after where it connects to the other side of the coupler.STINGREY said:pop the hood a check the vacumm line.its either broken or disconnected.driver side next to the brake booster and passenger side above the receiver dryer.