John H III
New Member
- Joined
- Oct 11, 2007
- Messages
- 5
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1999
- Make / Model
- ford
- Transmission
- Automatic
My 99 blows out of the vents while at idle or stopped but when under load it starts to blow out of defrost vents. I know its a vacuum leak but don't know if behind dash or somwhere under hood. only thing that has changed is transmission was rebuilt a week ago,before that it was fine. Any suggestions