My brothers Saturn Dealership just got a new tech bulletin for the 2004-2005 ion redlines. The conditions the bulletin talks about are extended cranking period followed by the engine running rough in temperatures below 50. Another condition is engine hesitates on acceleration in temperatures below 50. the fix is a new pcm calibration. My 04 redline has the same problems but at all temperatures and is getting recalibrated tomorrow. I will let you know if it fixed the problem.