This article is from the Chrysler-Plymouth-Dodge FAQ, by Dr. David Zatz with numerous contributions by others.
Under hard acceleration, the engine would cut out, rock like hell and
the check engine light would come on (until I released the pedal). (2.2
turbo) It turned out to be a disconnected vacuum hose to the wastegate
assembly. (Ralph J. Zottola) If the wastegate is not
opening, the turbo will overboost, the the computer will cut the fuel.
As the RPM decreases, the boost lowers and the fuel comes back on. (Mac