Hesitation above 2000 Roma.

The 3.3L engines (?) are notorious for internal distributor problems! .. Multi components inside the assembly make it difficult to diagnose exactly what the actual culprit is .. Usually the engine runs well until it reaches normal operating temperature .. Then the engine begins running rough, which includes - hesitation, stumbling and can cause engine stall with no start ... This is just what I have found pretty routinely @ the shop concerning the 3.3L V/6.... The 2.4L 4 cylinders do not exhibit this problem...... I do not see an engine size posted.