1996 Voyager dies

My 1996 Plymouth Voyager dies when I gave too much throttle, it happens when i push gas peddal about 3/4 or more down, the car just dies and won't start for ~30seconds.

Other question i have is what is this thing and where should it be attached to? The other end is attached to the throttle cable. Is it throttle pressure cable?
http://img256.imageshack.us/img256/5131/dsc00535om1.jpg (http://imageshack.us)

Which engine and 3 speed or 4 speed tranny??

Is this the original tranny?

Have you checked the fuel pressure with a fuel pressure gauge? Fuel pressure should be 49PSI. Could be fuel pump or fuel pressure regulator. The fuel pressure regulator should be on the fuel rail, I believe towards the passenger side take the hose off it you see fuel in the line replace regulator.