This article is from the Chrysler-Plymouth-Dodge FAQ, by Dr. David Zatz with numerous contributions by others.
Problem: 2.5 engine hesitates/sputters/lurches for a second now and
then under normal driving conditions (highway, cruising, foot steady on
gas). Reason: plug wires were going bad. (Paul F. Schikora )
Problem: hesitation/lurching. Solution: fouled plugs. Oil fouled plugs
may indicate serious problems or just bad PCV valve.
Problem: 3.0 V-6 bogging on acceleration. Solution: clean the throttle
body if it has gumming or varnish. You may have to clean the throttle
plate edges with Scotch Bright pads and clean the bore using a good
carburetor spray solvent.