Wait wait wait.. Why is it the dealership's fault? 3.0L Cougar had the 3.0L installed by somebody else, which we have no idea what he did. My suggestion would be to bring the car to the person that built it, and tell him that(if this was a recent build) he needs to fix the problem. If he for some reason welded something on the intake manifold, I can't figure out what it'd be.
Mark
