It hit me like a "two-ton heavy thing" when I was getting out of the shower this morning.
It's very simple when you think about it, and doesn't have as much to do with flow velocity for you doubting thomases as simple placement.
The truth is, the injector is located in the primary runner. With the secondary pinned open, and since the incoming air stream will follow the path of least resistance and is mostly filling the cylinder through the secondary runner, the fuel is not being carried into the cylinder properly.
So if we try a different upper like from the 3.0, I bet it would work better.
Comments?
Dan Beggs
99 Cougar V6, tweaked
