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Discussion Starter #1
My 2003 9-5 Aero has a rough idle. We hooked up a tech II to my car to change some things and look at the rough idle. It's missing in cylinders 2 and 3 when it's at idle but not if you give it gas. There is no check engine light or codes. Any ideas? This is what we tried so far.
  1. Spare DI
  2. Airflow meter
  3. Looked for vacuum leaks
  4. New plugs
  5. Fuel pump
Has this happened to anyone else? Most people seem to be stumped by this issue.
 

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Crankshaft position sensor problem? What plugs did you use? Was the spare DI checked on another car for a misfire count?
 

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Do some checking on this site regarding broken / cracked wires inside the throttle body. After everything you've already done, the throttle body issue would the next suspect. You'll probably end up needing your throttle body rebuilt by BBA Reman...
Remember that this misfire is cylider specific. A bad throttle body would likely show up with random misfires accross all cylinders.
 

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