The fuel injectors can fail and cause drivability problems. Often there is no Check Engine light and the failures can be caused by corrosion of the connector, clogging beyond the point of cleaning, and/or internal failures.
Average mileage: 122,334 (15,045–178,880)
Engines affected: 3.3L V6, V6
16 people reported this problem
Still is not repaired correctly. 2 years now - emissions problems. Have had an oxygen sensor replaced, all spark plugs replaced, numerous other things (hoses, belts, timing belt, radiator, power steering, center link and idler arm) just to name a few! I need help. Auto Zone codes say Knock sensor or misfire # 4 cylinder or Catalyst system efficiency below threshold. But mechanics can't seem to fix it and keep the check engine light off more than a week. It runs a little better with a full tank of high octane gas.