I have changed both intake and exhaust actuators cleared codes started car and every thing was clear until I restarted car next morning, engine light came back. Took it to a service station he replaced the intake actuator and same thing happened. He said he done some research on 2.5 and others have had the same problem, changing timing chains, with the same result . Told me I should go to dealership and have them do a diagnostic check on it, where they told me they would have to do an engine tear down to further investigate, and if timing chain is ok they would have to replace engine. My mechanic doesn't believe its the timing chain because there isn't any noise from it. Here is where I have the problem the only time I notice anything wrong with the car is on starting engine, sometimes it will stall, when restarted it runs smoothly. Help!!!