my 2004 ion RL began to take a long time to start, with many turn overs of the crank. i took it to 3 shops and no one could figure it out, the scan tool reads that the cam shaft positioning sensor is not responding, so we replaced that and didnt work, so i replaced the pcm and that didnt fix it, the wiring harness to the pcm all checks out good so does pcm and so does cam shaft sensor. but the pcm doesnt seem to see the sensor. they said if anyone has a tsb number for hard starting that could work, but they dont have one. anyone have any ideas or the tsb number?